Estimation of finite seismic source parameters for selected events of the West Bohemia year 2008 seismic swarm

0442163 - GFÚ 2016 RIV NL eng J - Journal Article
Kolář, Petr - Růžek, Bohuslav
Estimation of finite seismic source parameters for selected events of the West Bohemia year 2008 seismic swarm.
Journal of Seismology. Roč. 19, č. 2 (2015), s. 403-421. ISSN 1383-4649. E-ISSN 1573-157X
R&D Projects: GA ČR GAP210/10/1728
Institutional support: RVO:67985530
Keywords : West Bohemia year 2008 seismic swarm * finite seismic source * stopping phases * stress drop
Subject RIV: DC - Siesmology, Volcanology, Earth Structure
Impact factor: 1.550, year: 2015

Finite seismic source parameters were determined for a set of 91 selected events of the West Bohemia year 2008 earthquake swarm (ML from 0.6 to 3.7) using the stopping phases method. According to the theory, two stopping phases are generated along the source border where the rupture process terminates. These two phases form a Hilbert transform pair; it is also a criterion for their identification. Circular and elliptical source models were considered and their parameters were recovered using the differences in arrival times between the identified stopping phases. Generalization of the circular to elliptical model was found to be statistically significant only for a minority of the events; consequently, only circular source models were investigated in detail. Individual source parameter errors were estimated with the use of the jackknife method. Our results are in good agreement with a previously published theoretical formula relating source radius and magnitude and also with the relation derived in the year 2000 swarm.
Permanent Link: http://hdl.handle.net/11104/0245607