A unified earthquake catalogue for South Asia covering the period 1900–2014

Seismicity analysis is very much pertinent for Indian subcontinent and its adjoining region which is seismically active including many great earthquakes associated with collision and subduction tectonics in the northern, north-eastern part of the subcontinent and in the Andaman and Nicobar Island. A...

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Bibliographic Details
Published in:Natural hazards (Dordrecht) 2017-02, Vol.85 (3), p.1787-1810
Main Authors: Nath, Sankar Kumar, Mandal, Suman, Das Adhikari, Manik, Maiti, Soumya Kanti
Format: Article
Language:English
Subjects:
Centroids
Civil Engineering
Data collection
Earth and Environmental Science
Earth Sciences
Earthquakes
Environmental Management
Geological surveys
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Hydrogeology
Islands
Mathematical analysis
Natural Hazards
Original Paper
Regression analysis
Seismic activity
Seismic hazard
Seismicity
Seismology
Subduction (geology)
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Summary:Seismicity analysis is very much pertinent for Indian subcontinent and its adjoining region which is seismically active including many great earthquakes associated with collision and subduction tectonics in the northern, north-eastern part of the subcontinent and in the Andaman and Nicobar Island. An earthquake catalogue has been generated for South Asia covering the period 1900–2014 by compiling the records of earthquake occurrences from International Seismological Center, Global Centroid Moment Tensor (GCMT), US Geological Survey, India Meteorological Department and published literature. The uniform magnitude scaling in moment magnitude M W,GCMT is achieved through connecting relationships between different magnitude types. These relationships are derived by orthogonal standard regression analysis on available data pairs. The derived relationships have been compared with the existing equations already reported by others. The catalogue is subsequently subjected to a seismicity declustering algorithm to identify the foreshocks, main-shocks and aftershocks. The catalogue thus compiled is envisaged to be a useful resource for seismotectonic and seismic hazard studies in the region.
ISSN:0921-030X
1573-0840
DOI:10.1007/s11069-016-2665-6