Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Earthquake risk assessment in Qaenat area (Khorasan Province)

Document Type : Original Research Paper

Authors
Shayesteh Mehrabian
Goudarz Hamidi
Geophysics Institute, University of Tehran, Iran
Abstract
In this study the earthquakes catalogue for Qa'enat region in eastern Iran by using available references which concerning the earthquake data in Iran is provided. The procedures of, aftershocks deletion, the principle of region selection, the upper and lower limit magnitude and verification of the historical catalogue are applied. For some representative regions the Gutenberg- Richter relation curves according to their seismicity characteristics, by using the earthquake data greater than or equal to magnitude 3.0 (1974-1988) and higher magnitudes (1900-1998) are obtained. According to these results the annual occurrence rate of events of each magnitude can be inferred from the G-R relation and it seems that both results are almost the same. Therefore, using the obtained relations at the first stage as the proper region is selected with respect to the seismicity system and the duration of time can make estimation of the recurrence period of large earthquakes.
Keywords
seismicity
earthquakes catalogue
annual occurrence rate of events

Subjects

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Scientific Quarterly Journal of Geosciences
Volume 11, 41-42
Autumn & Winter 2002, Vol. 11, No. 41-42
Winter 2001
Pages 66-79