General Assembly of the International Union of Geodesy and Geophysics (Melbourne, 27 iunie-8 iulie 2011)

NIEP has participated in the Conference General Assembly of the International Union of Geodesy and Geophysics (Melbourne, 27 iunie-8 iulie 2011) in the framework of the theme "Seismological Observation and Interpretation/ Sub-Saharan Africa Seismology (S01/S03)" with the following contribution: A Review of the Romanian Digital Seismic Network Activity: from Earthquake Monitoring to Engineering Studies, authors  B. Grecu, D. Tataru, M. Popa, M. Radulian, B. Zaharia, C. Ionescu, C. Neagoe

Abstract

The main function of the Romanian Digital Seismic Network (RDSN) is to monitor seismic activity on the Romanian territory and to provide high quality data for source, Earth structure, microzonation and seismic hazard studies and for data exchange with international seismic data centres. The development of the RDSN to the present-day configuration was a process that started in fall of 2001 and took place over several years.
At present, the RDSN consists of 66 stations (34 broadband, 32 short period) and 2 seismic arrays, one in the Northern part of Romania (Bucovina array – BURAR) and one in the Vrancea epicentre area (Plostina array – PLOR). The data are continuously recorded and transmitted in real time to the Romanian National Data Centre. We present the monitoring performances of the network as well as new achievements in investigating
the crust and upper mantle structure in Romania. For engineering purposes, the network provides the ground motion parameters, such as peak ground acceleration (PGA), peak ground velocity (PGV) and response spectra (SA) characterizing the ground shaking during an earthquake (Shake Maps). As examples, we analyse the distribution of the ground motion in terms of PGA and PGV for two recent Vrancea intermediate-depth
events, April 25th, 2009 Mw = 5.0 and February 25th, 2010 Mw = 4.0.