HR: 1400h
AN: S33A-08    [Abstracts]
TI: Station Corrections for Venezuelan Seismic Network
AU: * Raquel, V
EM: rvasquez@funvisis.gob.ve
AF: FUNVISIS Venezuelan Foundation for Seismological Research, Caracas, Venezuela
AU: Rendon, H
EM: hrendon@funvisis.gob.ve
AB: In order to improve earthqueake locations, anomaly time corrections were determined for each of the 35 broadband seismic station of the Venezuelan National Network. The study is defined for the region between latitudes 5-14 degrees N and longitudes 73-60 degrees W; this area includes Venezuela, The Caribbean Sea, Trinidad and Tobago, Netherlands Antilles and northeast of Colombia. The anomaly time corrections for the stations were obtained by using a data base of 111 well localized local earthqueakes recorded with a magnitude Mw greater than 3.0 for 2-year period from January 2005 to January 2007. These station correction were calculated using software VELEST, which inverts arrival time data to produced one-dimensional velocity models and stations corrections using Join Hypocenter Determination technique. Negative and positive corrections were obtained; the minimum value (-0.95) was observed at station ITEV, while the maximum value (0.85) at ORIV. A plot of the improved seismicity map will be plotted and compared to the existing one for the region.
DE: 7230 Seismicity and tectonics (1207, 1217, 1240, 1242)
DE: 7294 Seismic instruments and networks (0935, 3025)
SC: Seismology [S]
MN: 2007 Joint Assembly