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Near real-time determination of earthquake source parameters for tsunami early warning from geodetic observations

Sunanda, MV and Kumar, TS and Nayak, SR (2016) Near real-time determination of earthquake source parameters for tsunami early warning from geodetic observations. In: XXIII ISPRS Congress, 12–19 July 2016, Czech Republic.

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Abstract

Exemplifying the tsunami source immediately after an earthquake is the most critical component of tsunami early warning, as not every earthquake generates a tsunami. After a major under sea earthquake, it is very important to determine whether or not it has actually triggered the deadly wave. The near real-time observations from near field networks such as strong motion and Global Positioning System (GPS) allows rapid determination of fault geometry. Here we present a complete processing chain of Indian Tsunami Early Warning System (ITEWS), starting from acquisition of geodetic raw data, processing, inversion and simulating the situation as it would be at warning center during any major earthquake. We determine the earthquake moment magnitude and generate the centroid moment tensor solution using a novel approach which are the key elements for tsunami early warning. Though the well established seismic monitoring network, numerical modeling and dissemination system are currently capable to provide tsunami warnings to most of the countries in and around the Indian Ocean, the study highlights the critical role of geodetic observations in determination of tsunami source for high-quality forecasting.

Item Type: Conference or Workshop Item (Paper)
Additional Information: This work is distributed under the Creative Commons
Subjects: Oceanography > oceanography
Depositing User: INCOIS Library
Date Deposited: 11 May 2019 05:25
Last Modified: 11 May 2019 05:25
URI: http://moeseprints.incois.gov.in/id/eprint/4267

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