GRiD MT (grid-based real-time determination of moment tensors) monitoring the long-period seismic wavefield

Autor:	Hitoshi Kawakatsu, Hiroshi Tsuruoka, Taku Urabe
Rok vydání:	2009
Předmět:	Seismometer Focal mechanism Physics and Astronomy (miscellaneous) Astronomy and Astrophysics Seismic noise Geodesy Grid Moment (mathematics) Geophysics Earthquake simulation Space and Planetary Science Seismic moment Vertical seismic profile Seismology Geology
Zdroj:	Physics of the Earth and Planetary Interiors. 175:8-16
ISSN:	0031-9201
Popis:	We have developed and implemented a new grid-based earthquake analysis system that continuously monitors long-period seismic wavefield of 20–50 s recorded by broadband seismometers. The new analysis system automatically and simultaneously determines the origin time, location and seismic moment tensor of seismic events within 3 min of their occurrence. This system has been in operation since 2003 at the Earthquake Research Institute (http://wwweic.eri.u-tokyo.ac.jp/GRiD MT/), and the locations and origin times are usually obtained within 3 s and 20 km away from the earthquake catalog values determined by the Japan Meteorological Agency (JMA). In addition, moment tensor solutions are comparable to the network solutions manually obtained. This new system should enable us to monitor long-period seismic wavefield continuously further to help identifying long-period (or low-frequency) events which are undetectable by the conventional monitoring of short-period seismic wavefields.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::17a283983858fb12e34700f51734f8ef https://doi.org/10.1016/j.pepi.2008.02.014 Zobrazit plný text záznamu Full Text from ScienceDirect