Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

The Causative fault of Garmsar earthquakes

Document Type : Original Research Paper

Author
Homayoon Safai
Esfahan University, Department of Geology
Abstract
This investigation makes an assessment that the swarm of earthquakes, which occurred in and around Garmsar, during the four months of the year 1988, is the result of the Kelers reverse fault. Because, the focal points of these earthquakes are compatible with the fault data obtained, regardless of the possible errors made in interpretation, but nevertheless this precautionary evaluation of data may be acceptable.
On the other hand, the determined mechanisms for these earthquakes shows a compressional trend and dipping towards the north, being accompanied with strike-slip as shown by the Kelers Fault. 449
Moreover, field observation on the manner in which joints and superficial deposits are formed, are indicative of reactivated Kelers Fault. In addition, based on evidences discussed in the text, it is assumed that the above-mentioned fault has had also role (s) in bringing about the earthquakes in the 20th century as well as historical ones.
Keywords
Garmsar earthquakes
Subjects
 
Berberian, M., 1981- Active faulting and tectonics of Iran, In: Gupta, H. K. and Delany, F. M., (eds.), Zagros- Hindukush- Himalaya Geodynamic evolution, Am. Geophys. Un. and Geol. Soc. Am. Geodynamics series, 3, p. 33-69.
Earthquake data report- 1988- U. S. Department of the Interior, Geological Survey.
Lee, E. H. and Lahr, J. C.,- 1974- Fortran computer program, Hypo 71.
Tchalenko, J. S., 1974- Recent destructive earthquakes in the central Alborz, Geol, Surv. Iran, No. 29, P. 97-116. USCGS- United States Coast and Geodetic Survey, Earthquake file data.
Scientific Quarterly Journal of Geosciences
Volume 4, Issue 14
Winter 1995, Vol. 4, No. 14
Spring 1995
Pages 28-35