W. Olimat¹

¹Jordan Seismological Observatory

Abstract:

Work at the JSO (Jordan Seismological Observatory) identified some differences in the result of seismic data analysis in most of international seismic data centers and the results of IDC products (REB and SSEB). Seismic data (origin time, Latitude, Longitude, Depth and magnitude) were compared for some events in the International Data Center products REB (Reviewed Event Bulletin) and SSEB (Standard Screened Event Bulletin) with the data for same events from other International Seismic Data Centers like: EMSC (Euro-Med Seismological Centre), GFZ (German Research Center for Geosciences), KOERI (KANDILLI Observatory and Earthquake Research Institute), JSO (Jordan Seismological Observatory), GII (Geophysical Institute of Israel) and others. It was found that there is not a big difference in the results especially in the ORIGIN TIME, LATITUDE, LONGITUDE and MAGNITUDE but there is a difference in the DEPTH. Further studies are needed to identify the reason for this cases. It may be from the analysis algorithm or from the velocity model used at the IDC, from travel time tables or from other logic reasons.