DBPapers
DOI: 10.5593/SGEM2015/B13/S5.122

SATELLITE OBSERVATIONS AND THE MITIGATION OF SEISMIC RISK

S.F. Balan, V. Poncos, D. Teleaga, B.F. Apostol
Friday 7 August 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-33-9 / ISSN 1314-2704, June 18-24, 2015, Book1 Vol. 3, 939-946 pp

ABSTRACT
This work focuses on using SAR (Synthetic Aperture Radar) satellite data in order to help mitigate the seismic risk of Bucharest Metropolis, the capital of Romania. The city has more than 2.5 million inhabitants and it is considered after Istanbul the second-most earthquake-endangered metropolis in Europe.
This study is part of an ongoing joint project between National Institute of R-D for Earth Physics (NIRDEP) and Terrasigna Ltd. NIRDEP is taking care of the seismic network and data processing for the whole Romania, having a consistent number of seismic digital stations also in Bucharest. Terrrasigna applied the PSI technique to extract the ground deformation in Bucharest during July 2011 – January 2013, from a long time-series of SLC TerraSAR-X images. Based on the ground deformation satellite map, we can identify some seismic risk (hazard and vulnerability) in Bucharest Metropolis. The map reveals local ups and downs on the city surface, which could have different causes.
If there is a larger settlement and structural damage begins, even almost unnoticed and an earthquake of magnitude more than 7 would come, (3 of such events were in Romania in the XX-th century: in the year 1940 with magnitude Mw = 7.6; year 1977, with magnitude Mw = 7.4 , with almost 1400 people dead only in Bucharest, year 1986, with magnitude Mw = 7.1,) damage of the building could occur.
That is why it is very useful to know, maybe with years in advance that a large settlement occurred and the buildings there could be affected by a strong earthquake.

Keywords : synthetic aperture radar, satellite, earthquake, settlement, microzonation.