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AN EXPRESS ANALYSIS OF A LOCAL NETWORK CATALOG OF EARTHQUAKES IN THE REGION OF QUETTA, PAKISTAN

Pages : 76 – 83

Farhana Sarwar Saleem amd Saleem Iqbal LalaRukh Kamal

Abstract:

Earthquake catalogs are a valuable result of fundamental seismological practice and they form the basis for seismicity, seismotectonic, seismic risk and hazard investigation. Before on proceed in such investigation it is essential to examine and report on the spatial and temporal homogeneity and completeness of the catalog. As it is well known fact that man made inhomogeneities and artifacts exist in earthquake catalogs that are produced by changing seismological networks. In this paper, we are focused on the analysis of local catalog for the region Quetta, of Pakistan. as this region has a history of many large earthquakes. The local catalog considered here is referred from the International Seismological Center (ISC). The catalog contains information from 01-01-1992 to 30-06-2006. The catalog covers an area Latitude 28.00 to 32.00 Deg. N, Longitude 65.00 to 69.00 Deg E and contains 690 events. To examine and report on the spatial and temporal homogeneity and completeness of the local catalog its comparison is done with the Global Catalog of National Earthquake Information Center (NEIC) of USA. Finally to get a homogeneous catalog fir the region, we merge the two catalogs by considering different data properties and different data analysis techniques prepared by different data collection agencies. The merged catalog is rather homogeneous as variation in the completeness of the catalogs is reduced. The merged catalog is reliable for the applications of different earthquake Prediction techniques.

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