Fatehjang (Pakistan) Earthquake of February 17, 1993: source mechanism and intensity distribution
Abstract
A shallow earthquake of magnitude (ML) 5.3 occurred at a depth of 8.9 km in the Fatehjang area on February 17, 1993. It was followed by four aftershocks with magnitude (ML) ≤ 3.8. The main shock was located in the foothills of Kala Chitta Range which is a part of the Hazara Thrust System. The composite fault plane solution of these events yielded predominantly strike- slip movement with orientation striking N46oW and dipping 45o NE. The maximum intensity in the epicentral area was V on the Modified Mercalli Intensity Scale near Mahura, trending in WNW direction. No loss of life or property was reported.
References
Bullen, K. E., Bolt, B. A., 1985. An introduction to the theory of seismology. Cambridge University Press; London, New York.
Havskov, J., Ottemöller, L., 2001. SEISAN: The Earthquake Analysis Software. University of Bergen, Bergen, Norway.
Jaswal, T. M., Lillie, R. J. Lawrence, R. D., 1997. Structure and evolution of the North Potwar Deformed Zone, Pakistan. AAPG Bulletin, 81, 308-328.
Lienert, B. R. E., Havskov, J., 1995. A computer program for locating earthquakes both locally and globally. Seismological Research Letters, 66, 26-36.
Pivnik, D. A., Sercombe, W. T., 1993. Compression and transpression–related deformation in the Kohat Plateau, NW Pakistan. In: Treloar, P. J., Searle, M.P. (Eds.), Himalayan Tectonics. Geological Society London Special Publication, 74, 559-58.
Snoke, J. A., Munsey, J. W., Teague, A. G., Bollinger, G. A., 1984. A program for focal mechanism determination by combined use of polarity and SV-P amplitude ratio data. Earthquake notes, 55, p15.
U.S. Department of the Interior/Geological Survey; Preliminary Determination of Epicenters. Weekly Bulletin No. 7-93, March, 1993.
