Time clustering of earthquakes in the Sumatra–Andaman and Himalayan regions

Increased frequency of earthquakes in the Sumatra–Andaman region in the past 10 years reflects time clustering of earthquakes and does not necessarily imply low recurrence interval of earthquake in the region. Time clustering of earthquakes can occur either due to the stress change (either through s...

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Bibliographic Details
Published in:Current science (Bangalore) 2011-04, Vol.100 (7), p.1068-1071
Main Authors: Ambikapathy, A., Gahalaut, V. K.
Format: Article
Language:English
Subjects:
Convergent boundaries
Earth
Earthquakes
Marine
RESEARCH COMMUNICATIONS
Subduction zones
Time windows
Online Access:Get full text
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Summary:Increased frequency of earthquakes in the Sumatra–Andaman region in the past 10 years reflects time clustering of earthquakes and does not necessarily imply low recurrence interval of earthquake in the region. Time clustering of earthquakes can occur either due to the stress change (either through static or dynamic stress transfer) caused by the occurrence of a great earthquake in the region, or it could just be a chance in which earthquake occurrence is almost simultaneous in two or more segments, despite differences in the earthquake cycle due to difference in the phase of strain accumulation, rheology, plate convergence rate, etc. in these segments. We note that the Himalaya and the adjoining regions too showed earthquake time clustering during 1897–1950.
ISSN:0011-3891