Fractal geometry of faults and seismicity of Koyna-Warna region west Indiausing LANDSAT images

The Koyna-Warna region has been shaken by several earthquakes greater than magnitude 4 in the last 35 years. Four of them in 1967, 1973, 1980 and 1993 , were potentially very destructive with magnitudes exceeding 5.0. The majo rity of seismic events recorded to date has been induced from Koyna-Warna r eservoir areas. This paper discusses the fractal analysis of a fault map fr om LANDSAT images with the increasing seismic activity in the region. The r egion is divided into six blocks and the fractal dimension of each block is calculated using a box-counting technique. A plot of a three-dimensional m ap of the fractal dimension is prepared. Tt shows that the value of the fra ctal dimension is gently dipping from NE to SW. The fractal dimension is us ed to estimate the b-value in the frequency-magnitude relation of earthquak es in the region which is in agreement with earlier studies.