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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:21 |
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Conference: Bucharest University Faculty of Physics 2006 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Earthquakes analysis using seismic array stations
Authors:
Felix Borleanu, Maria Rogozea, Daniela Ghica,
Mihaela Popa, Mircea Radulian
Affiliation:
National Institute for Earth Physics
E-mail
felix@infp.ro
Keywords:
seismic array
Abstract:
Bucovina seismic array (BURAR) was installed in 2002 in the Northern part of Romania (47.61480 N latitude, 25.21680 E longitudes, 1150 m altitude) as a result of the cooperation between Air Force Technical Aplications Center, USA and National Institute for Earth Physics, Romania.BURAR is a medium-aperture array, consisting of ten seismic elements, located in boreholes and distributed on a 5x5 km2 area; nine with short-period vertical sensors and one component with broadband three-component sensor.
Since the new station has been operating the earthquakes survey of Romania territory has been significantly improved.Data recorded by BURAR during 01.01.2005 – 12.31.2005 time interval, were first processed and analyzed, in order to establish the array detection capability of the local earthquakes, occurred in different Romania seismic zones.A spectral ratios technique is applied in order to determine the calibration relationships for magnitude. These relationships are obtained using only the information gathered by BURAR station.The spectral ratios are computed relative to a reference event, representative for each seismic zone. This method has the advantage to eliminate the path effects.The new calibration procedure will provide rapid and real magnitude estimation for Romanian earthquakes.
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