RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 10, ES5002, doi:10.2205/2008ES000303, 2008

7. Discussion

[36]  Presently, most of the analysis is done for the seismic data of January 1999 to January 2005 with the improved quality of the catalogue for this period. The grid based modeling of spatial analysis of seismicity (Figure 2) shows that the region around Delhi has lowest value (2.0) of the minimal representative magnitudes, while its value is highest (2.6) in the region of Punjab reentrant and SW of Garhwal-Kumaon region. The seismic activity of earthquakes with m=3 is highest to the SW of Garhwal-Kumaon region and lowest in the Delhi-Haridwar region (Figure 3), While the b-value pattern is opposite at these two regions (Figure 4). The b-value is around 0.5 for Kangra-Chamba region and less than 0.5 for the Garhwal-Kumaon region. The low b-value of these two regions can be stated that the regions have less capability to withstand the developing stress. The Lunar component of tidal force is compared with the seismic activity of the region in Figure 6 that shows the area AI seismically active to the daily variation of tidal force A r. The level of statistics s in this area is high enough to testify essential distinction between frequencies of earthquakes for two compared phases. This result manifested that area AI is in a condition of primary vertical tectonic compression. The standard deviation of the Earth surface elevations (consequences of geotectonic deformation) with RMS value more than 500 m is positively correlated with the strong earthquakes M ge 6 (Figure 7).


RJES

Citation: Gitis, V., E. Yurkov, B. Arora, S. Chabak, N. Kumar, and P. Baidya (2008), Analysis of seismicity in North India, Russ. J. Earth Sci., 10, ES5002, doi:10.2205/2008ES000303.

Copyright 2008 by the Russian Journal of Earth Sciences

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