RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 10, ES5002, doi:10.2205/2008ES000303, 2008
[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 6 (Figure 7).
Citation: 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 (Powered by TeXWeb (Win32, v.2.0).