Implementation of a regional velocity model in Seiscomp3 System for Iran
عنوان دوره: هجدهمین کنفرانس ژئوفیزیک ایران
نویسندگان
1پژوهشگاه بین المللی زلزله شناسی و مهندسی زلزله
2زلزله شناسی، پژوهشکده زلزله شناسی، پژوهشگاه بین المللی زلزله شناسی و مهنذسی زلزله، تهران، ایران
چکیده
Real-time or near real-time earthquake monitoring has been developed through the last decade. The main objective of Real-time monitoring is to feed the earthquake early warning systems. IIEES, which has 26 permanent broadband seismic stations all over the country, has used SeisComP3 for acquisition, monitoring and automatic location of earthquakes. Seiscomp3 uses a grid based technique to locate hypocenters after true phase detection applied by a two stage detector for picking P waves. The quality of absolute event locations is controlled by several factors, including network geometry, number of available phases, arrival-time reading accuracy and information about the crustal structure. Due to relatively poor coverage of stations and phase misreading which seems to be inevitable in auto phase detection, we should do the best possible tuning for the velocity model of the region. In this study, we construct a velocity model for SeisComP3 and show the improvements by comparing the results with the two main agencies (IRSC and IIEES) for earthquake announcement in Iran, and locations derived by AK135 model from another SeisComP3 system.
کلیدواژه ها
 
Title
Implementation of a regional velocity model in Seiscomp3 System for Iran
Authors
Abolfazl Komeazi, shahrokh pourbeyranvand
Abstract
Real-time or near real-time earthquake monitoring has been developed through the last decade. The main objective of Real-time monitoring is to feed the earthquake early warning systems. IIEES, which has 26 permanent broadband seismic stations all over the country, has used SeisComP3 for acquisition, monitoring and automatic location of earthquakes. Seiscomp3 uses a grid based technique to locate hypocenters after true phase detection applied by a two stage detector for picking P waves. The quality of absolute event locations is controlled by several factors, including network geometry, number of available phases, arrival-time reading accuracy and information about the crustal structure. Due to relatively poor coverage of stations and phase misreading which seems to be inevitable in auto phase detection, we should do the best possible tuning for the velocity model of the region. In this study, we construct a velocity model for SeisComP3 and show the improvements by comparing the results with the two main agencies (IRSC and IIEES) for earthquake announcement in Iran, and locations derived by AK135 model from another SeisComP3 system.
Keywords
atalog, Earthquake, Location, magnitude, monitoring, SeisComP3