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| Titel |
Time-predictable model applicability for earthquake occurrence in northeast India and vicinity |
| VerfasserIn |
A. Panthi, D. Shanker, H. N. Singh, A. Kumar, H. Paudyal |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 3 ; Nr. 11, no. 3 (2011-03-28), S.993-1002 |
| Datensatznummer |
250009279
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| Publikation (Nr.) |
 copernicus.org/nhess-11-993-2011.pdf |
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| Zusammenfassung |
| Northeast India and its vicinity is one of the seismically most active regions in
the world, where a few large and several moderate earthquakes have occurred in the
past. In this study the region of northeast India has been considered for an earthquake
generation model using earthquake data as reported by earthquake catalogues
National Geophysical Data Centre, National Earthquake Information Centre,
United States Geological Survey and from book prepared by Gupta et al. (1986)
for the period 1906–2008. The events having a surface wave magnitude of Ms≥5.5
were considered for statistical analysis. In this region,
nineteen seismogenic sources were identified by the observation of
clustering of earthquakes. It is observed that the time interval between the
two consecutive mainshocks depends upon the preceding mainshock magnitude
(Mp) and not on the following mainshock (Mf). This result
corroborates the validity of time-predictable model in northeast India and
its adjoining regions. A linear relation between the logarithm of repeat time
(T) of two consecutive events and the magnitude of the preceding mainshock is
established in the form LogT = cMp+a, where "c" is a positive slope
of line and "a" is function of minimum magnitude of the earthquake
considered. The values of the parameters "c" and "a" are estimated to be
0.21 and 0.35 in northeast India and its adjoining regions. The less value of
c than the average implies that the earthquake occurrence in this region is
different from those of plate boundaries. The result derived can be used for
long term seismic hazard estimation in the delineated seismogenic regions. |
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