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2009•Bulletin of the International Institute of Seismology and Earthquake EngineeringRequires access

MOMENT TENSOR AND HYPOCENTER DETERMINATION USING WAVEFORM DATA FROM THE NEW BANGLADESH SEISMIC NETWORK

Sayeed Ahmed Choudhury, Tatsuhiko Hara

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Abstract

The Bangladesh Meteorological Department (BMD) has established a new digital seismic observation network in 2007. The data from this digital network have been used to determine a moment tensor using software developed by Dreger (2003). I analyzed the November 11, 2007 Bangladesh-India border earthquake. The obtained focal mechanism is consistent with that of the Global CMT catalog. This result suggests that it is possible for BMD to monitor and investigate the seismic activities by moment tensor determination procedure using data from the newly established Bangladesh Meteorological Department Seismic Network. I also performed hypocenter determination for the recent three earthquakes. The results for the two events that occurred in Bangladesh are consistent with the USGS hypocenters and felt reports. As for the event in Myanmar, the difference between their depths is large.

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What this paper is about

The Bangladesh Meteorological Department (BMD) has established a new digital seismic observation network in 2007. The data from this digital network have been used to determine a moment tensor using software developed by Dreger (2003). I analyzed the November 11, 2007 Bangladesh-India border earthquake. The obtained focal mechanism is consistent with that of the Global CMT catalog. This result suggests that it is possible for BMD to monitor and investigate the seismic activities by moment tensor determination procedure using data from the newly established Bangladesh Meteorological Department Seismic Network. I also performed hypocenter determination for the recent three earthquakes. The results for the two events that occurred in Bangladesh are consistent with the USGS hypocenters and felt reports. As for the event in Myanmar, the difference between their depths is large.

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Available abstract

The Bangladesh Meteorological Department (BMD) has established a new digital seismic observation network in 2007. The data from this digital network have been used to determine a moment tensor using software developed by Dreger (2003). I analyzed the November 11, 2007 Bangladesh-India border earthquake. The obtained focal mechanism is consistent with that of the Global CMT catalog. This result suggests that it is possible for BMD to monitor and investigate the seismic activities by moment tensor determination procedure using data from the newly established Bangladesh Meteorological Department Seismic Network. I also performed hypocenter determination for the recent three earthquakes. The results for the two events that occurred in Bangladesh are consistent with the USGS hypocenters and felt reports. As for the event in Myanmar, the difference between their depths is large.

Key concepts: Hypocenter, Seismology, Moment tensor, Geology, Focal mechanism, Moment (physics), Waveform, Seismic moment

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