Comprehensive Earthquake Catalogs and Seismicity Parameters from Incomplete Earthquake Catalogs of Guilan Region, Iran
Abstract: Statistics of human
losses and financial casualties in Guilan province as one of the most populated
and strategic areas in the north of Iran have doubled the importance of having
knowledge about earthquake and strategies to reduce its effect. In order to
investigate seismic hazard analysis, earthquake records along with selecting
the proper distance of intended locations were gathered to make Poissonian
catalogs. The earthquake catalogs cover the geographical area limited to
35.0°-39.3°N, 47.1-52.2°E and include around 4,000 earthquake events between
the years of 855 to 2016. An extensive
amount of efforts and times are required to eliminate duplicated events, to
unify the magnitude scales and to cluster the earthquake sequences with
variable windows in time and location domains to remove aftershocks and
foreshocks. The Final homogenous catalog consists of around 110 events for each
region. Magnitude of completeness in different time intervals is reported for
Guilan region. Seismicity parameters were achieved using Gutenberg-Richter
method by Zmap and Kijko-Sellovell approaches for important cities of Guilan
including Rasht, Anzali, Rudbar, and Lahijan. Comparative analysis of the
results from Zmap and Kijko-Sellovell approaches shows good consistency in the
estimation of seismic parameters with the result of literature.
Keywords: Earthquake Catalog;
Seismic Parameters; Annual Rate of Exceedance; Time-Space Windows; Magnitude of
Completeness
Author: Ali Ghorbani, Ardavan
Izadi
Journal Code: jptsipilgg170027
