Departamentul de studiul structurii si dinamicii litosferei

Structura departamentului
Directii principale de cercetare
Proiecte de cercetare
Participare la programe si proiecte internationale
Participare la simpozioane, conferinte, congrese

Structura departamentului

Laboratorul de Studiul Structurii si Dinamicii Litosferei are urmatoarea structura:

Sef de laborator Dr. Ing. Andrei BALA, CS II – bala@infp.ro ( descarca C.V. Andrei Bala )
4 cercetatori stiintifici principali;
1 inginer diplomat electronist;
5 asistenti cercetare.

Directii principale de cercetare

Laboratorul nostru functioneaza inca de la infiintarea INCDFP, in 1994, si are ca scop principal cercetarea structurii litosferei la scara regionala si locala, folosind metode seismice si seismologice. Sunt abordate si subiecte privind dinamica litosferei si in special miscarile actuale ale crustei terestre masurate prin cele mai noi metode.

Principalele directii de cercetare din cadrul Laboratorului 400 sunt:

Structura crustei terestre la scara regionala si locala;
Dinamica litosferei prin interpretarea complexa a masuratorilor de miscare actuala a crustei terestre;
Elaborarea modelelor geologice si tectonice cu elemente ale proprietatilor fizice ale rocilor, cu aplicatii directe in seismologie si hazardul seismic;
Studii ale seismicitatii crustale si de seismotectonica pentru estimarea comportarii dinamice a crustei terestre in caz de seism major.

In ultimii ani au fost abordate si o serie de studii cu caracter local si regional privind hazardul natural local:

Studii de microzonare seismică (hazard seismic local) a zonelor dens populate, in special in zona Bucurestiului;
Tomografia seismica a marilor baraje (Vidraru);
Studii privind calculul deplasarilor barajelor hidrotehnice prin metode satelitare; subsidenta bazinelor miniere.

Proiecte nationale de cercetare cu participarea membrilor departamentului

Proiecte in cadrul programului CEEX, Romania, 2005-2006

Proiect CEEX-Mener nr. 647/2005
Corelarea seismicitatii crustale si a câmpului de stres asociat cu sistemele de falii active – element primar în evaluarea si reducerea riscului seismic în România
Director de proiect: dr. ing. Raileanu Victor, Cercetator stiintific 1.
Proiect CEEX-Mener nr. 632/2005 (Partener)
Metodologii avansate in procesarea datelor seismice de refractie
Responsabil Stiintific : dr. ing. Andrei BALA, Cercetator stiintific 2.
Proiect CEEX-MENER nr. 725/2006
Modele seismotectonice ale litosferei zonelor seismogene Vrancea, Dobrogea si platforma moesica pentru estimarea comportarii dinamice a structurii geologice locale in caz de seism major.
Director de proiect : Drd. Mihai Diaconescu, Cercetator stiintific 3.
Proiect CEEX-Relansin nr. 295/2006 (Partener)
Determinari 3d pentru calculul deplasarilor barajelor hidrotehnice prin metode satelitare. Responsabil proiect: ing. 1 Laurentiu Munteanu.
Proiect CEEX-Mener nr. 721/2006 (Partener)
Raspunsul reliefului suprafetei terestre la procesele tectonice actuale in zona de coliziune continentala Vrancea
Responsabil proiect: ing. 1 Laurentiu Munteanu.
Proiect CEEX-Mener nr. 722/2006 (Partener)
Subsidenta terenurilor afectate de exploatarile miniere subterane. cazul bazinului minier Petrosani. Responsabil proiect: ing. 1 Laurentiu Munteanu.
Proiect CEEX-Amcsit nr. 161/2006 (Partener)
Cercetari multidisciplinare privind hazardele naturale; studiu de caz: producerea fenomenului tsunami in Marea Neagra.
Director de proiect : Drd. Mihai Diaconescu, Cercetator stiintific 3.

Proiecte in cadrul programului PNCDI2 2007 – 2008

Proiect EMMESLAB/2007
Evaluarea multidisciplinară a mărimii efectelor seismice locale în microzonarea Bucureştiului
Director proiect : dr. ing. Andrei BALA, Cercetator stiintific 2.
Proiect SURIZO/2007
Modelarea surselor seismice din estul Romaniei pentru estimarea hazardului seismic
Director de proiect : Drd. Mihai Diaconescu, Cercetator stiintific 3.
Proiect TEMERISC/2007(partener)
Tehnici si metodologii inovative de evaluare a riscului de hazard natural (cutremure si alunecari de teren)
Responsabil proiect: dr. ing. Raileanu Victor, Cercetator stiintific 1
Proiect VELOROM/2008(partener)
Caracterizarea geonomica a unitatilor tectonice majore din Romania. Modele ale distributiilor de viteze ale undelor seismice
Responsabil proiect: dr. ing. Raileanu Victor, Cercetator stiintific 1

Participare la programe si proiecte internationale

Structure of THE lithosphere

Doua importante proiecte internationale VRANCEA 99 and VRANCEA 2001 au fost desfasurate in cadrul Programului international Centrul de colaborare stiintifica 461, Universitatea din Karlsruhe, Germania: CUTREMURELE PUTERNICE: O PROVOCARE PENTRU GEOSTIINTE SI INGINERIA CONSTRUCTIILOR, desfasurat in Romania intre anii 1997 – 2007 si sunt prezentate in figura urmatoare.

Interpretarea datelor seismice de adancime colectate in timpul acestor proiecte a fost facuta in comun de o echipa romano- germana.

Modelele finale si interpretarea geologica si geofizica a profilelor realizate in timpul desfasurarii acestor proiecte au fost executate si publicate in 3 articole din Tectonophysics: Tectonophysics, 340, 233-256, 2001; Tectonophysics, 410, 251-272, 2005; Tectonophysics, 430, 1-25, 2007.

Profilele internationale VRANCEA 99 and VRANCEA 2001

Proiectul VRANCEA 99

Echipa germana: Dr. Franz Hauser, Dr. Claus Prodehl, Dr. Werner Fielitz
Echipa romana: Dr. Victor Raileanu, Dr. Andrei Bala

Pentru orizonturile mai adanci valorile vitezelor seismice au fost masurate direct pe profilul de refractie VRANCEA’99, executat de INCDFP in cooperare cu Universitatea din Kalrsruhe, in cadrul cooperarii bilaterale CRC 461: “Cutremurele puternice - o provocare pentru Stiintele Pamantului si Ingineria Constructiilor”. Valorile vitezelor ca si modul de obtinere au fost prezentate pe larg de Hauser et al., 2001 si Raileanu et al., 2005. Este de remarcat ca pentru aceste orizonturi seismice valorile undelor S au fost obtinute prin procedee de prelucrare separate de valorile undelor P.

Pentru baza sedimentarului, aflata la 7000 m adancime, a fost masurata o viteza a undelor P de 5800 m/s si a undelor S de 3250 m/s (Raileanu et al., 2005).

Trecerea la fundamentul cristalin este marcata de o crestere a vitezelor la 5900 m/s , respectiv 3450 m/s (vezi Figura 4).

Modelul crustal de viteze al profilului seismic arata o structura stratificata care contine cuvertura sedimentara, crusta cristalina si mantaua superioara (Figura 4).Vitezele medii pentru intregul interval crustal in crusta sunt de Vp=6,2 km/ si Vs=3.58 km/s.

De-a lungul profilului seismic stiva sedimentara este alcatuita din 2 pana la 4 strate. Vp variaza de la 2,0 la 5,8 km/s, iar Vs de la 1,2 la 3,6 km/s. In partea sudica a profilului primul strat sedimentar este alcatuit din sedimente de varsta neogena (strat1, fig.12, Vp=2,1-2,7 km/s, Vs=1,2-1,6 km/s). De la capatul nordic al profiluli structura sedimentarului contine Panzele Moldavide, alcatuite din sedimente (stratele 2 si 3) cu viteze Vp=3,3-4,8 km/s si Vs=1,7-2,85 km/s). Al patrulea strat (stratul 4) constituie autohtonul mezo-paleozoic al Platformelor Scitica (in nord) si Moesica (la sud de pichetul 25) cu Vp=4,7-5,8 km/s si Vs=2,65-3,25. Grosimea pachetului de strate sedimentare variaza de la cca 7-8 km la marginile profilului la cca 12-13 km in centrul sau. Fundamentul cristalin este marcat de o crestere a vitezelor seismice la Vp=5,9 km/s si respective Vs=3,40-3,45 km/s ( Figura 4 si Hauser at al.,2001 ).

Vitezele seismice in crusta sunt relativ constante de-a lungul interfetelor si gradual crescatoare la Vp=6,2 km/s si Vs=3,7 km/s la baza crustei superioare. O interfata crustala definita prin reflexii PcP si ScS separa crusta superioara de cea inferioara la adancimi cuprinse intre 20 si 31 km adancime.

Crusta inferioara este caracterizata prin viteze seismice crescatoare in adancime de la Vp=6,7-7,0 km/s si respectiv Vs=3,9-4,07 km/s.

Adancimea la baza crustei (Moho) creste de la 38 km in nord la cca 41 km in centrul sectiunii, iar apoi scade la cca 30 km in capatul sudic.

In mantaua superioara au fost detecate viteze Vp=7,9 kms si Vs=4,4 km/s.

Proiectul VRANCEA 2001

German team: Dr. Franz Hauser, Dr. Claus Prodehl, Dr. Werner Fielitz, Dr. Michael Landes
Romanian team: Dr. Victor Raileanu, Dr. Andrei Bala

Un profil seismic in lungime de 450 km si orientat WNW – ESE a fost executat in Romania in 2001 utilizand metoda refractiei de adancime. El se intinde din mijlocul Transilavaniei, traverseaza zona de curbura a Carpatilor Orientali si zona seismica Vrancea , catre bazinul Focsani si in continuare spre Orogenul Nord Dobrogean , pana in apropierea Marii Negre.

Un total de 10 incarcaturi explozive cu marimi de 300 – 1500 kg au fost inregistrate de un total de 700 geofoni. Calitatea datelor

A fost variabila, depinzand de marimea exploziei, dar si de conditiile geologice. Interpretarea datelor indica o structura multistratificata cu grosimi si viteze variabile. Partea sedimentara cuprinde pana la 7 strate cu viteze seismice intre 2.0 – 5.9 km/s. Domeniul sedimentar atinge o grosime maxima de 22 km in Bazinul Focsani. Succesiunea sedimentara este alcatuita din (1) Panzele Carpatilor Orientali, (2) Bazinul Transilavaniei de varsta Neogena, ce acopera Bazinul Tarnavelor de varsta Cretacic tarziu pana la Paleogen, (3) Bazinul Focsani din Avanfosa Carpatica, ce acopera roci sedimentare autohtone Mesozoice si Paleozoice, ca si un probabil graben Permo-Triasic al Platformei Moesice si (4) rocile Paleozoice si Mesozoice ale Orogenului Nord Dobrogean.

Crusta cristalina prezinta variatii considerabile in grosime atat pe toata lungimea profilului, cat si in cadrul subdiviziunilor individuale, care se coreleaza bine cu blocurile crustale Tisza-Dacia, Moesian and Nord Dobrogean. Structura laterala de viteze din cadrul acestor blocuri ramane constanta la aproximativ 6,0 km/s, la interfata superioara a fundamentului cristalin si 7,0 km/s deasupra interfetei MOHO. Blocul Tisza-Dacia are o grosime de 33 – 37 km si prezinta zone de viteze reduse in primii 15 km adancime, datorate probabil cutelor de fundament alternante cu succesiuni sedimentare ale Carpatilor Orientali. Crusta cristalina din Platforma Moesica nu depaseste 25 km grosime si este acoperita de pana la 22 km de sedimente. Crusta Nord Dobrogeana atinge o grosime de circa 44 km si este probabil o prelungire a Platformei est Europene acoperita de o margine subtire a Orogenului Nord Dobrogean de 1-2 km grosime.

Un model crustal bazat pe sosirile undelor P este interpretat in termeni structurali si prezentat in articolul din Tectonophysics, 430, 1-25, 2007.

Programul Bilateral International Centrul de Colaborare Stiintifica 461, Universitatea din Karlsruhe, Germania: Cutremurele puternice: o provocare pentru geostiinte si ingineria constructiilor

Mai multe detalii despre Programul Bilateral International Centrul de Colaborare Stiintifica 461, Universitatea din Karlsruhe, Germania: CUTREMURELE PUTERNICE: O PROVOCARE PENTRU GEOSTIINTE SI INGINERIA CONSTRUCTIILOR, desfasurat in Romania intre anii 1997 – 2007, si date despre toate subprogramele desfasurate si despre rezultatele lor se gasesc la: http://www-sfb461.physik.uni-karlsruhe.de.

Subproject A1

Deep seismic sounding of the Vrancea zone project leaders: dr. J.R.R. Ritter, dr. T. Forbriger, Geophysical Institute, Karlsruhe University. Romanian partners: S. Balan, Gh. Marmureanu, V. Raileanu, A. Bala, National Institute for Earth Physics, Bucharest, Romania.

Subproject A2

Seismic tomography of the carpathian arc project leaders: prof. dr. Friedemann Wenzel, Geophysical Institute, Karlsruhe University. Romanian partners: dr. Mircea Radulian, National Institute for Earth Physics, Bucharest, Romania.

Subproject B6

Geotechnical and seismic microzonation of Bucharest project leaders: prof. J. Rohn. Romanian partners: V. Ciugudean, Metroul s.a.; M. Radulian, S. Balan, A. Bala, National Institute for Earth Physics, Bucharest, Romania

NATO science grants

NATO Collaborative Linkage Grant - EST.CLG.974792 – 1999 – 2001: “The Earth Lithosphere under the Vrancea area from seismic refraction investigation”.

The project assisted the Romanian participants in the VRANCEA’99 project by providing additional travel and living expenses during data interpretation. NATO country Co-director: Dr. Claus Prodehl. Romanian Co-director: Dr. Victor Raileanu.

NATO Computer Networking Supplement - EST.CNS.976375 – 1999 – 2000: supported the upgrading of the computer network in the Laboratory of Lithosphere Structure and Laboratory of Seismology of NIEP.

NATO country Co-director: Dr. Claus Prodehl. Romanian Co-director: Dr. Andrei Bala.

NATO Collaborative Linkage Grant - EST.CLG.978848 – 2001 – 2003: “Structure of the Earth’s lithosphere beneath Vrancea area, Romania, from seismic –refraction and tomography inversion”.

NATO country Co-director : Prof. Dr. Friedemann Wenzel. Romanian Co-director: Dr. Andrei Bala. This project supported the Romanian scientists to produce in cooperation with German scientists basic data for the investigation of the upper lithosphere in the Vrancea area of Romania, where within a small volume strong and destructive earthquakes occur. The project is linked to the CRC 461 at the University of Karlsruhe: “Strong Earthquakes: A challenge for Geosciences and Civil Engineering”.

NATO Networking Infrastructure Grant - EST.NIG.978382 – 2001 – 2002: “Improving the networking of the Romanian institutes of physics and their u plink connection to the Internet”.

NATO country Co-director : Dr. Klaus Bonjer. Romanian Co-director: Dr. Andrei Bala. This project was designed to improve and upgrade the link between the National Institute for Earth Physics and the National Institute for Physics of Materials, which is the main node for all the local networks of the physics research institutes located in Magurele campus. The uplink to the ROEDU.NET, which is the Internet service provider for all the institutes in Magurele campus, was also considerably improved.

Lucrari publicate in perioada 2000 – 2009

2009

Bala A., Grecu B., Ciugudean V., Raileanu V., Dynamic properties of the Quaternary sedimentary rocks and their influence on seismic site effects. Case study in Bucharest City, Romania, Soil Dynamics and Earthquake Engineering, 29, 144 – 154, 2009.

Raileanu V., Dinu C., Ardeleanu L., Diaconescu V., Popescu E., Bala A., Crustal seismicity and associated fault systems in Romania, Procedings of the 27th ECGS Workshop: Seismicity Patterns in the Euro-Med Region, Luxembourg, 17-19 Nov.2008, in “Cahiers du Centre Europeen de Geodynamique et de Seismologie”, 5 pp, 2009.

2008

Bala A., Balan S.F., Ritter J.R.R., Hannich D., Arion C. (2008), Seismic in situ measurements in Boreholes in Bucharest City, Romania, GEO 2008, The Scientific meeting of the Faculty of Geology and Geophysics, University of Bucharest, 144 – 150.

Bala A., Grecu B., Hannich D., Raileanu V. (2008), Methods to assess the site effects based on in situ measurements in Bucharest City, The Scientific meeting of the Faculty of Geology and Geophysics, University of Bucharest, 151 – 157.

Bala, A., Cristea, P., Raileanu, V., Nitica, C., Continuous Distribution of Elastic Parameters of the Shallow Quaternary Layers along the 3C Seismic Profile East Bucharest, Romanian Reports in Physics, Vol. 60, no. 1, 111-129, 2008.

B. Zaharia, M. Radulian, M. Popa, B. Grecu, A. Bala, D. Tataru, Estimation of the local response using Nakamura method for Bucharest area, Romanian Reports in Physics, Vol. 60, no. 1, 131-144, 2008.

Bala A., Zihan I., Ciugudean V., Raileanu V., Grecu B., Physical and Dynamic properties of the Quaternary Sedimentary Layers in and around Bucharest City, Romanian Reports in Physics, Vol. 60, no. 2, 389 – 401, 2008.

Bala, A., Aldea, A., Hannich, D., Ehret, D., Raileanu, V., Methods to Assess the Site effects Based on in situ Measurements in Bucharest City, Romania, Romanian Reports in Physics, accepted for publication, 2008.

2007

F. Hauser , V. Raileanu , W. Fielitz , C. Dinu , M. Landes , A. Bala , C. Prodehl, Seismic crustal structure between the Transylvanian Basin and the Black Sea, Romania, Tectonophysics, 430, 1 – 25, 2007.

V.Raileanu, A.Bala, B.Grecu, Local Seismic Effects in Sites Located in the South and Central part Of Transylvania based on spectral ratios, Romanian Reports in Physics, Vol. 59, No. 1, p 165–178, 2007.

Bala A., Ritter J.R.R., Hannich D., Balan S,F., Arion C., Local Site Effects Based on In situ Measurements in Bucharest City Romania, in the Frame of NATO SfP Project 981882, Proceedings of the International Symposium on Seismic Risk reduction, ISSRR-2007, Paper 06, 367-374, Ed Orizonturi Universitare Timisoara, ISBN 978-973-638-311-3

Bala A., Zihan I., Ciugudean V., Raileanu V., Grecu B.(2007). Physical and Dynamic properties of the Quaternary Sedimentary Layers in and around Bucharest City, Proceedings of the International Symposium on Seismic Risk reduction, ISSRR-2007, Paper 07, 359-366, Ed Orizonturi Universitare Timisoara, ISBN 978-973-638-311-3

V. Raileanu, C. Dinu, M. Radulian, V. Diaconescu, A. Bala, E. Popescu and M. Popa, (2007),

Crustal seismicity and active fault systems in the SE of Romania, Proceedings of the International Symposium on Seismic Risk reduction, ISSRR-2007,Paper 14, 269-276, Ed. Orizonturi Universitare Timisoara, ISBN 978-973-638-311-3

A. Bala, S.F. Balan , J.R.R. Ritter , D. Hannich , G. Huber , J. Rohn , Seismic site effects based on in situ borehole measurements in Bucharest, Romania., Proceedings of the International Symposium on Strong Vrancea Earthquake and risk mitigation, Oct. 4 – 6 2007, Bucharest, Romania, 190 – 204, 2007, ISBN 978-973-755-247-1

A. Bala , B. Grecu , D. Hannich , D. Ehret, V. Raileanu, Methods to assess the site effects based on in situ measurements in Bucharest city., Proceedings of the International Symposium on Strong Vrancea Earthquake and risk mitigation, Oct. 4 – 6, 2007, Bucharest, Romania, 248 – 252, 2007, ISBN 978-973-755-247-1

S.F. Balan, A. Bala, J.R.R. Ritter, D. Hannich, G. Huber, J. Rohn, Geotechnical laboratory test for the microzonation of Bucharest, Proceedings of the International Symposium on Strong Vrancea Earthquake and risk mitigation, Oct. 4 – 6, 2007, Bucharest, Romania, 244 – 247, 2007, ISBN 978-973-755-247-1

V. Raileanu, F. Hauser, A. Bala, W. Fielitz, C. Prodehl, C. Dinu, M. Landes, Deep Seismic Sounding Across The Vrancea Region, Proceedings of the International Symposium on Strong Vrancea Earthquake and risk mitigation, Oct. 4 – 6, 2007, Bucharest, Romania, 80 – 85, 2007, ISBN 978-973-755-247-1.

V. Raileanu, A. Bala, C. Dinu, M. Radulian, E. Popescu, V. Diaconescu, D. Mateciuc, M. Popa, Crustal seismicity and Deep Structure in the SE Carpathians and its Foreland, Proceedings of the International Symposium on Strong Vrancea Earthquake and risk mitigation, Oct. 4 – 6, 2007, Bucharest, Romania, 86 – 89, 2007, ISBN 978-973-755-247-1.

C.O. Cioflan, F. Romanelli, B. Grecu, M. Popa, N. Mandrescu, V. Raileanu, A. Bala, G.F. Panza, General Mapping of the strong ground motion in Bucharest area and related hazard/risk scenarios, in Impact of Vrancea Earthquakes on the Security of Bucharest and other Adjacent Areas Ed. G.F. Panza, M. Radulian, I. Kuznetsov, 93-99, 2007.

Knapp J.H., Knapp C.C., Raileanu V., Matenco L., Mocanu V., Dinu C, 2005. Crustal constraints of the origin of mantle seismicity in the Vrancea zone, Romania: The case for active continental lithospheric delamination.Tectonophysics, 410, 311-323.

2006

Bala A., Raileanu V., Zihan I., Ciugudean V., Grecu B., Physical and dynamic properties of the shallow sedimentary rocks in Bucharest Metropolitan area, Romanian Reports in Physics , 58, 2, 221 - 250, 2006.

D. Hannich, G. Huber, D. Ehret, H. Hoetzl, S. Balan, A. Bala, M. Bretotean, V. Ciugudean, SCPTU- Techniques used for shallow geologic/ hydrogeologic site characterization in Bucharest, Romania, Proceedings of the Third International Symposium on the effects of Surface geology on Seismic Motion, Grenoble, France, 30 August - 1 September 2006, paper 71, 12 p.

V.Răileanu, C.Dinu, M.Radulian, V.Diaconescu, A. Bălă, E.Popescu, L.Ardeleanu, M.Popa, D.Mateciuc, Correlation of crustal seismicity with active fault systems within the eastern and southern part of Romania, Scientific Session “MENER 2006”, 6 p., Bucharest , 2006.

2005

Bala A., Raileanu V., Mandrescu N., Zihan I., Dananau E., Physical properties of the Quaternary sedimentary rocks in the Eastern Bucharest area, Romanian Reports in Physics, Vol. 57, No. 1, p. 151–163, 2005.

Raileanu V., Bala A., Hauser F., Prodehl C., Fielitz W., Crustal properties from S-wave and gravity data along a seismic refraction profile in Romania, Tectonophysics, 410, 251 – 272, 2005.

Raileanu V., Bala A., Grecu B., An assessment of local seismic effects in sites located from the North of Dobrogea to the Eastern Carpathians Bend , Romanian Reports in Physics, vol. 57, 2, 267 – 279, 2005.

Bala, A., Raileanu, V., Grecu, B., Zihan, I., Ciugudean, V., Physical properties of the upper sedimentary rocks in the Bucharest Metropolitan area, Journal of the Balkan Geophysical Society, Vol. 8, Suppl.1, p. 757 – 760, 2005.

Bala, A., Radulian, M., Popescu, E., Benetatos, C., Characteristics of the focal mechanism of the earthquakes in Romania , Journal of the Balkan Geophysical Society, Vol. 8, Suppl.1, p. 699 – 702, 2005.

Grecu B., Radulian M., Popa M., Bonjer K.-P., Bala A., Raileanu V., Empirical evaluation of site effects in Romania by means of H/V spectral ratios, Journal of the Balkan Geophysical Society,Vol. 8, Suppl.1, p. 711 – 714, 2005.

Raileanu, V., Hauser, F., Fielitz, W., Dinu, C., Landes, M., Bala, A. And Prodehl, C., A crustal structure model from the North Dobrogea through the Vrancea region to the Western Transylvania, Journal of the Balkan Geophysical Society, Vol. 8, Suppl.1, p. 299 – 302, 2005.

V.Raileanu, A.Bala, B.Grecu, Local seismic effects as resulted from a seismic experiment in Romania, Journal of the Balkan Geophysical Society, Vol. 8, Suppl.1, p. 703 - 706, 2005.

2004

Bala A., Radulian M., Popescu E., Benetatos C., Earthquake focal mechanisms and their depth distributions in Vrancea zone, Romania, Proceedings of the 5-th Symposium on Eastern Mediterranean Geology, Thessaloniki, Greece, 14-20 April 2004, T5-9.

A. Bala, M. Radulian, E Popescu, Intermediate depth earthquake distribution and their focal mechanism in Vrancea zone, Romania., in Studi Geologici Camerti, Special Issue, 2004, Proceedings of the Workshop COST – Action 625, Active Faults : Analysis, Processes and Monitoring, 25 – 28, 2004.

2003

Bala, A., Radulian, M., Popescu, E., (2003), Earthquakes distribution and their focal mechanism in correlation with the active tectonic zones of Romania, Journal of Geodynamics, 36, 129-145, 2003.

2002

Bala A., Raileanu V., Popa Mihaela, Some Physical properties of the crust along the seismic refraction profile VRANCEA’ 99, Romanian Jour. of Physics, vol. 47, 9 –10, 933 – 944, 2002.

Radulian, M., Popescu Emilia, Bala, A., Utale Ana, Catalog of fault plane solutions for the earthquakes occurred on the romanian territory, Romanian Jour. of Physics, vol. 47, 5 – 6, 663-685, 2002.

Radulian, M., Bala, A., Popescu, E., Earthquakes distribution and their focal mechanism in seismogenic zones of Romania, Romanian Jour. of Physics, vol. 47, 9 – 10, 945 – 963, 2002.

Hauser, F., Prodehl, C., Landes, M., and the VRANCEA working group, Seismic experiment targets earthquake-prone region in Romania, EOS, transactions, vol.83, no.41, p. 457, 462-463, 2002.

2001

Bala, A., Diaconescu, M., Biter, M. (2001) Spatial distribution of the earthquakes in the Vrancea zone and tectonic correlations, Romanian Journal of Physics, 46, vol.7-8, 459 – 474.

Hauser, F., Raileanu, V., Fielitz, W., Bala, A., Prodehl, C., Polonic, G., Schulze, A. (2001) VRANCEA99 - The Crustal structure beneath the southeastern Carpathians and the Moesian Platform from a refraction seismic profile in Romania, Tectonophysics, vol. 340, 3-4, 233 -256.

Nacu, V., Mateciuc., D., Biter, M., Radulescu, F., Grecu, V., (2001) Crustal deformations parameters using GPS measurements in the Romanian territory, Romanian J. Phys., 46, 9-10, 629 – 636.

Popa M., Kissling E., Radulian M., Bonjer K.-P., Enescu D., Dragan S. and the CALIXTO Research Group (2001) Local source tomography using body waves to deduce a minimum 1D velocity model for Vrancea (Romania) zone, Romanian Report in Physics 53, 519-536, 2001.

Radulescu, F. (2001), A history of Romanian Seismology (1882-1955), Romanian Reports in Physics, 53, 3-8, 293 - 305.

Raileanu, V., Bala, A. (2001) Some correlations between the distribution of the crustal earthquake depths and rheological properties within the Moesian Platform and its northern neighborhood, Romanian Journal of Physics, 46, vol.7-8, 475 – 484.

Raileanu, V. (2001), Local seismic effects in five sites south of Bacau , Romania , using spectral ratio derived from crustal seismic refraction data, Romanian Journal of Physics, 46, 9 – 10, 617 – 627.

2000

Hauser, F., Raileanu, V., Prodehl, C., Bala, A., Schulze, A., Denton, P. (2000) The Seismic-Refraction Project VRANCEA-99. Open-File Report, Geophys. Inst., Univ.Karlsruhe.

Mocanu V., the CALIXTO’99 Research Group (2000) Detailed look at final stage of plate break-off. Tomographic investigation to snapshot this process at the Carpathian bending zone, Romanian Geophysics 7, Suppl. 1, 264-267.

Prodehl, C., Raileanu, V., Hauser F., Bala, A., Rumpel, H.-M., Schulze, A. (2000) The seismic-refraction project VRANCEA-99, EUROPROBE NEWS 13, p.15-18.

Raileanu, V., Hauser, F., Bala, A., Prodehl, C., Schulze, A. (2000) Modeling of the crustal structure along the refraction seismic profile VRANCEA’99, Bucharest International Geophysical Conference & Exposition, Romanian Geophysics, vol. 7, Suppl. 1, p.514-517.

Diaconescu M., Grigore D., Malita Z., Popa M., Bala A. (2000) Distribution of earthquakes from Vrancea area, Bucharest International Geophysical Conference &Exposition,Romanian Geophysics, vol. 7, Suppl. 1, p.326-327.

Participarea la simpozioane, conferinte, congrese internationale (selectie)

1999

Bala, A., Raileanu, V., Crustal structure image based on geophysical and geological data along the deep refraction profile Bucharest-Bacau (Romania), JSS 44/E/08-B4, Abstracts,Week B, B143, The XXII-nd General Assembly of IUGG, Birmingham, United Kingdom, 18-30 July 1999.

Prodehl, C., Raileanu, V., Hauser, F., Rumpel, H-M., Schulze, A., Bala, A.: The seismic refraction project VRANCEA'99 through the SE Carpathians - a first report, Joint Meeting of EUROPROBE TESZ, PANCARDI AND GEORIFT PROJECTS, Dobrogea - the interface between the Carpathians and the Trans-European Suture Zone, Tulcea, Romania, 25 Sept. - 6 Oct. 1999, abstract in Romanian Journal of Tectonics and Regional Geology, 77, suppl. 1, p.27 (PO17), 1999.

Hauser, F., Raileanu, V., Prodehl, C., Bala, A., Rumpel, H-M., Schulze, A.: Vrancea'99 - First Results of a refraction Seismic Profile through the SE Carpathians, AGU Fall Meeting,December, 13 - 17,1999, abstract in EOS Transactions (supplement), 80 (46), F675 (S21B-04), 1999.

2000

Hauser F., Raileanu V., Prodehl C., Bala A., Schulze A.: VRANCEA'99 - Crustal structure along a N - S refraction profile in Romania, The XXV-th General Assembly of EGS, Nice ,France, April 25 - 29, 2000.

Hauser, F., Raileanu, F., Bala, A., Prodehl, C., Schulze, A.: Crustal structure of the southeastern Carpathians and the Moesian platform from a seismic-refraction experiment in Romania. Abstract, submitted to Europ. Seismol. Comm. Conference, Lisbon, Portugal,September 2000.

Hauser F., Raileanu V., Bala A., Prodehl C., Schulze A.: A crustal structure model between the Southeastern Carpathians and the Moesian Platform derived from a seismic refraction experiment in Romania, AGU Fall Meeting, 2000.

2001

Hauser, F., Raileanu, V., Fielitz, W., Bala, A., Prodehl, C., Polonic G.: A Seismic Cross Section through the Upper Lithosphere of the SE Carpathians and the Moesian Platform in Romania, The XXVI-th General Assembly of EGS, Nice , France, March, 2001.

Werner Fielitz, Franz Hauser, Victor Raileanu, Andrei Bala, Claus Prodehl, Gabriela Polonic, Vrancea 99 - A Refraction Seismic Cross Section through the Upper Lithosphere of the Southeastern Carpathians and the Moesian Platform in proximity to the Transeuropean Suture Zone in Romania, Europrobe Neoproterozoic - Early Palaeozoic Time - Slice Symposium in Ankara, Turkey, 30 September - 2 October 2001.

F. Hauser, V. Raileanu, M. Landes, A. Bala, C. Prodehl, J. Bribach, S. Harder, E. Hegedues, R. G. Keller, R. A. Stephenson, V. Mocanu, C. Dinu, C. Diaconescu: Crustal Investigations of the Earthquake-Prone Vrancea Region in Romania - Part 1: First Data Examples From a Seismic Refraction Survey Between the Black Sea and the Transylvanian Basin., AGU, San Francisco, December 2001.

2002

V. Raileanu, A.Bala, F. Hauser, W. Fielitz, C. Prodehl, J. Ritter, VRANCEA99 - PRELIMINARY RESULTS FROM S-WAVE AND GRAVITY MODELLING OF A SEISMIC REFRACTION LINE IN ROMANIA, The XXVII-th General Assembly of EGS,Nice, France, April, 2002.

F. Hauser, V. Raileanu, W. Fielitz, A. Bala, C. Prodehl, J. Bribach, S.Harder, E. Hegedues, VRANCEA 2001 - FIRST RESULTS FROM A SEISMIC REFRACTION SURVEY BETWEEN THE BLACK SEA AND THE TRANSSYLVANIAN BASIN, The XXVII-th General Assembly of EGS, Nice, France, April, 2002.

V. Raileanu, F. Hauser, A. Bala, C. Prodehl, A first model of the S wave velocity structure on the Vrancea’99 seismic refraction line, Romania, The 3-rd Congress of the Balkan Geophysical Society, Sofia, Bulgaria, June, 2002.

Hauser, F., Prodehl, C., Raileanu, V., Landes, M., Fielitz, W., Bala, A., Harder, S., Mocanu, V. VRANCEA 2001 – Two-dimensional refraction tomography from a seismic experiment in Romania. Poster, Europ. Seismol. Comm., 28th Gen. Ass. Genova, Sep.2002, Book of Abstracts p. 110.,2002.

Hauser, F., Raileanu, V., Fielitz, W., Bala, A., Prodehl, C., Bribach, J., Harder, S., Hegedues, E., Mocanu, V. (2002) VRANCEA 2001 – First Results from a seismic refraction survey between the Black Sea and the Transylvanian Basin. Geophys. Res.Abstract, Europ. Geophys. Soc., Vol. 4.

Hauser, F., Raileanu, V., Landes, M., Bala, A., Prodehl, C., Fielitz, W. (2002) VRANCEA2001 - 2-D Crustal Velocity Structure Across the Earthquake Prone Vrancea Region in Romania. EOS Trans. AGU, 83 (47), Fall Meet. Suppl., Abstract S61A-1099.

Knapp, J.H., Diaconescu, C.C., Anderson, E., Mocanu, V., Stephenson, R., Raileanu, V., Matenco, L., Dinu, C., Prodehl, C., Hauser, F., Harder, S., Lithospheric Studies of Intermediate Depth Seismicity of the Vrancea Zone, Romania: Demise of a Subduction Zone or a Subduction Zone Model? IGCP Workshop, Ha Long Bay, Vietnam (abstract), 2002.

Raileanu, V., Bala, A., Hauser, F., Fielitz, W., Prodehl, C., Ritter. J.R.R. (2002) VRANCEA 99 – Preliminary results from S-wave and gravity modelling of a seismic refraction line in Romania. Geophys. Res. Abstract, Europ. Geophys. Soc., Vol. 4.

Raileanu, V., Hauser, F., Bala, A., Prodehl, C., Fielitz, W. (2002) Seismic data interpretation on the VRANCEA99 refraction line. NIEP Symposium "25 years of research in Earth Physics".

2003

Hauser, F., Raileanu, V., Landes, M., Bala, A., Prodehl, C., Fielitz, W., Crustal properties of the Eastern Carpathians, derived from two seismic refraction profiles in Romania. Abstract, DGG Jena, 2003. Popescu E., Radulian M., Bala A., Source characteristics of Vrancea subcrustal earthquakes as revealed by scaling properties of the acceleration spectra, International Workshop – 3D Monitoring of Active Tectonic Structures , 17 – 21 September 2003, Sofia , Bulgaria. Bala A., Raileanu V., “Physical properties of the rocks along the Vrancea’99 seismic profile”, paper presented in Geophysical Institute, Karlsruhe University, 22 Oct. 2003

2004

Bala A., Radulian M., Popescu E., Benetatos C., „Earthquake focal mechanisms and their depth distribution in Vrancea zone, Romania”, poster presented in the 5-th International symposium on Eastern Mediterranean Geology, Thessaloniki, Greece, 14-20 April 2004.

Bala A., Earthquakes mechanisms and stress regime in active tectonic areas of Romania, 7-th International Workshop 3D monitoring of Active Tectonic areas, 12 – 16 May 2004, Granada, Spain.

Werner Fielitz, Andrei Bala, Franz Hauser, Michael Landes, Claus Prodehl, Mihaela Popa, Victor Raileanu, „Crustal Structure and Neogene to Quaternary deformation in the Carpathians of Romania as deduced from two refraction seimic lines and a 3-D velocity model”, paper presented in the 32-nd International Geological Congress, Florence , Italy, August 2004.

M. Radulian, E. Popescu , N. Mândrescu , A. Bâlă , G.F. Panza , Patterns of seismicity and focal mechanism in connection with tectonic structure in Vrancea region , 8-th International Workshop : 3D monitoring of Active Tectonic Areas, 23 – 25 September 2004, Bucharest, Romania.

D. Stanica , M. Stanica and A. Bala: Geophysical methodologies used for emphasizing the interrelation among the active faults, landslides and seismicity, 8-th International Workshop : 3D monitoring of Active Tectonic Areas, 23 – 25 September 2004, Bucharest, Romania.

A. Bala, V. Raileanu, A. Merciu, „Physical properties of the Quaternary sedimentary rocks in the Eastern Bucharest area”, CONRO 2004, 5 – 10 Oct. 2004, Bucharest, Romania.

2005

Aurelian Pantea, Angela Constantin, Andrei Bala, Preliminary results on macroseismic intensities for 27-th Otober 2004 earthquake (Mw=6) from Vrancea seismogenic zone, Romania, International Workshop , Bratislava, Slovakia, 25 – 29 May 2005.

B. Grecu, M. Radulian, M. Popa, K-P. Bonjer, A. Bala and V. Raileanu, Empirical evaluation of site effects in Romania by means of H/V spectral ratios, The IV-th Congress of the Balkan Geophysical Society, 9-12 Oct.2005, Bucharest, Romania.

Andrei Bala, Victor Raileanu, Bogdan Grecu, Ion Zihan, Viorica Ciugudean, Physical properties of the upper sedimentary rocks in the Bucharest Metropolitan area, poster presented in the IV-th Congress of the Balkanic Geophysical Society, 9-12 Oct.2005, Bucharest, Romania.

Andrei Bala, Mircea Radulian, Emilia Popescu, Christoforos Benetatos, Characteristics of the focal mechanism of the earthquakes in Romania , poster presented in the IV-th Congress of the Balkanic Geophysical Society, 9-12 Oct.2005, Bucharest, Romania.

Raileanu, V., Hauser, F., Fielitz, W., Dinu, C., Landes, M., Bala, A. And Prodehl, C., 2005, A crustal structure model from the North Dobrogea through the Vrancea region to the Western Transylvania, The 4th Congress of the Balkanic Geophysical Society, 9-12 Oct.2005, Bucharest, Romania.

V.Raileanu, A.Bala, B.Grecu, Local seismic effects as resulted from a seismic experiment in Romania, The IV-th Congress of the Balkan Geophysical Society, 9-12 Oct.2005, Bucharest, Romania.

Bala, A. Pantea, M. Radulian, E. Popescu, “Seismic monitoring of Active tectonic zones in Romania”, International Workshop, Wroclaw, Poland, 12 -16 October 2005.

2006

V. Raileanu , L. Matenco, M. Radulian, C. Dinu, A. Bala, V. Diaconescu, M. Popa, E. Popescu, Correlation between crustal seismicity and the active fault systems in the south-eastern part of Romania, EGU-2006, 2-7 April, 2006, Vienna , Austria.

V. Raileanu, J. Ritter, M.Radulian, M. Martin, A. Bala , F. Hauser, M. Popa and C. Ionescu, Crustal and lithospheric structure within and around the Vrancea seismogenic zone, Romania, EGU-2006, 2-7 April, 2006, Vienna , Austria.

Grecu, B., Radulian, M., Popa, M., Bonjer, K-P., Bala, A., Raileanu, V., Tataru, D. Site effects in Romania based on ambient vibration measurements and small earthquakes recordings, EGU-2006, 2-7 April, 2006, Vienna , Austria.

A. Bala, S. Balan, V. Raileanu, B. Grecu, „Seismic site effects in Romania. Linear versus nonlinear approach”, paper presented in the symposium „20 Years of Nonlinear Dynamics in Geosciences”, Rhodes, Greece, 10.06 - 15.06.2006.

V.Răileanu, C.Dinu, M.Radulian, V.Diaconescu, A. Bălă, E.Popescu, L.Ardeleanu, M.Popa, D.Mateciuc, CORRELATION OF CRUSTAL SEISMICITY WITH ACTIVE FAULT SYSTEMS WITHIN THE EASTERN AND SOUTHERN PART OF ROMANIA, SCIENTIFIC SESSION “MENER 2006”, 6 p., Bucharest , 2006.

2007

Andrei Bala, Mircea Radulian, NATIONAL INSTITUTE FOR EARTH PHYSICS, BUCHAREST, ROMANIA, RESEARCH DIRECTIONS, OBJECTIVES, INTERNATIONAL COOPERATIONS, UNESCO Meeting, Athens, Greece, March 2007.

Andrei Bala, Ion Zihan, Viorica Ciugudean, Victor Raileanu , Bogdan Grecu, Physical and dynamic properties of the Quaternary sedimentary LAYERS in and around Bucharest City, “Thirty Years from the Romania Earthquake of March 4, 1977”, Bucharest, Romania, 1-3 March 2007.

A. Bala (1), S. Balan (1), D. Hannich (2), J.R. R. Ritter (3), J. Rohn (4), Local site effects based on in situ seismic measurements in Bucharest City, Romania, EGU 2007, 14 - 20 April 2007, Vienna, Austria.

V. Raileanu, M. Radulian, C. Ionescu, M. Popa, D. Tataru, Geological settings and crustal models for the seismological stations within the eastern part of Romania., EGU 2007, 14 - 20 April 2007, Vienna, Austria.

V. Raileanu, C.Dinu, M. Radulian, A. Bala, V. Diaconescu, E. Popescu, M. Popa (2007). Crustal seismicity and the active fault systems in the SW of Romania. EGU 2007, 14 - 20 April 2007, Vienna, Austria.

Bala A., Zihan I., Ciugudean V., Raileanu V., Grecu B. (2007). Physical and Dynamic properties of the Quaternary Sedimentary Layers in and around Bucharest City, Proceedings of the International Symposium on Seismic Risk reduction, Paper 07, 359-366, Ed Orizonturi Universitare Timisoara.

Bala A., Ritter J.R.R., Hannich D., Balan S,F., Arion C. (2007). Local Site Effects Based on In situ Measurements in Bucharest City Romania, in the Frame of NATO SfP Project 981882, Proceedings of the International Symposium on Seismic Risk reduction, Paper 06, 367-374, Ed. Orizonturi Universitare Timisoara.

V. Raileanu, C. Dinu, M. Radulian, V. Diaconescu, A. Bala, E. Popescu and M. Popa (2007). Crustal seismicity and active fault systems in the SE of Romania, Proceedings of the International Symposium on Seismic Risk reduction, Paper 14, 269-276, Ed. Orizonturi Universitare Timisoara.

2008

A. Bala, A. Aldea, J. R. R. Ritter ,D. Hannich , Methods to Assess the Site Effects Based on in situ Measurements in large urban Areas. Application in Bucharest City, Romania, EGU 2008, 14 - 20 April 2008, Vienna, Austria.

A. Bala, S. Balan, J. R. R. Ritter, D. Hannich, J. Rohn, Linear modelling of seismic site effects in Bucharest City, Romania, EGU 2008, 14 - 20 April 2008, Vienna, Austria.

Bala A., , Balan S.F., Ritter J.R.R., Hannich D., Arion C., Seismic in situ Measurements in Boreholes in Bucharest City, Romania , Simpozionul de Geofizica, Bucuresti, 2008.

Bala A., Grecu B., Hannich D., Raileanu V., Methods to Assess the Site Effects Based on in situ Measurements in Bucharest City, Romania , Simpozionul de Geofizica, Bucuresti, 2008.

A. Bala1 , S.F. Balan1, J.R.R. Ritter2, D. Hannich2, J. Rohn3, Seismic site effect modelling based on in situ borehole measurements in Bucharest, Romania, 31st General Assembly of the European Seismological Commission ESC 2008 Hersonissos, Crete, Greece, 7-12 September 2008, 236.

A. Bala1, A. Aldea2, D. Hannich3, D. Ehret4, V. Raileanu1, Methods to Assess the Site Effects Based on in situ Measurements in Bucharest City, Romania , 31st General Assembly of the European Seismological Commission ESC 2008 Hersonissos, Crete, Greece, 7-12 September 2008, 235-236.

Andrei Bala, Mircea Radulian1, Bogdan Grecu1, Emilia Popescu, Source Effect vs. Site Effect of Vrancea Earthquakes in Bucharest City, Romania, 31st General Assembly of the European Seismological Commission ESC 2008 Hersonissos, Crete, Greece, 7-12 September 2008, 219.

Andrei Bala, Mircea Radulian1, Bogdan Grecu1, Emilia Popescu, Source Effect vs. Site Effect of Vrancea Earthquakes in Bucharest City, Romania, 27-th ECGS Workshop, Luxembourg, 19 – 21 November 2008.

Raileanu, V., Ardeleanu, L., Bălă, A. and Popescu, E. Deep structure and seismicity in the SE Carpathians and Focsani depression. European Geosciences Union, General Assembly 2008, Vienna, Austria, 13 – 18 April 2008.

Raileanu, V., Ionescu, V. and Tătaru, D. Crustal models in Romania based on seismic data. European Geosciences Union, General Assembly 2008, Vienna, Austria, 13 – 18 April 2008.

Raileanu, V., Bălă, A., Grecu, B. and Tătaru, D. Crustal models in Romania based on seismic data. Simpozionul naţional de Geologie şi Geofizică, GEO 2008, 23-24 Mai 2008, Facultatea de Geologie şi Geofizică, Universitatea Bucureşti.

Raileanu V, Bala A, Ardeleanu L, Popescu E. Crustal seismicity vs. deep structure in Focsani Basin (Romania). 31st General Assembly, European Seismological Commission ESC, Crete, Greece, sept.2008

Raileanu V., Dinu C., Ardeleanu L., Diaconescu V., Popescu E., Bala A., Crustal seismicity and associated fault systems in Romania, The 27th ECGS Workshop: Seismicity Patterns in the Euro-Med Region, Luxembourg, 17-19 Nov.2008,

Raileanu V, Bala A, Ionescu C, Tataru D. Crustal models in Romania from seismic data. 31st General Assembly, European Seismological Commission ESC, Crete, Greece, sept.2008

V. Raileanu, C. Dinu, M.Radulian, E., Popescu, V. Diaconescu,.A. Bala, L.Ardeleanu, M., Popa, 2008. Seismicitatea crustală şi câmpurile de falii asociate din Romania. Simpozion CEEX-MENER 2008, Sept. 2008. Sinaia.