APPLICATION OF TIME-DOMAIN MOMENT TENSOR INVERSION TO WAVEFORM DATA FROM THE NEW SAUDI ARABIA BROADBAND SEISMIC NETWORK
Supervisor: Tatsuhiko HARA
Country: Saudi Arabia
Recently Saudi Geological Survey (SGS) has established a new broadband seismic network. I applied the time domain moment tensor inversion code developed by Dreger (2003) to the waveform data from this new seismic network. I analyzed three earthquakes: the July 2, 2006 event (ML 4.7) in the Red Sea area, the February 2, 2006 (ML 5.0) and April 13, 2007 (ML 4.1) events in the Gulf of Aqaba area. The obtained focal mechanisms are consistent with the tectonic settings, i.e., extension along the spreading centers in Red Sea and strike slip movement along the Dead Sea transform fault, respectively. Also, the focal mechanism of the Red Sea event is partly consistent with that of the Global CMT Catalog. These results suggest that it is possible to monitor and investigate seismic activity by moment tensor determination using data from the new SGS broadband seismic network. I also discussed the issues to be completed before applying the technique used in this study to routine moment tensor determination.
|Citation: ||Bulletin of IISEE, 42, 31-36.|