The applicability of modern methods of earthquake location

Publication Type  Journal Article
Year of Publication  2006
Authors  Richards, P. G.; Waldhauser, F.; Schaff, D.; Kim, W. Y.
Journal Title  Pure and Applied Geophysics
Volume  163
Issue  2-3
Pages  351-372
Journal Date  Mar
ISBN Number  0033-4553
Accession Number  ISI:000236357600004
Key Words  earthquake location; waveform cross correlation; seismicity studies; california earthquakes; charlevoix earthquakes; china earthquakes; new madrid earthquakes; form cross-correlation; california hypocenter relocation; nuclear-explosion locations; northern

We compare traditional methods of seismic event location, based on phase pick data and analysis of events one-at-a-time, with a modern method based on cross-correlation measurements and joint analysis of numerous events. In application to four different regions representing different types of seismicity and monitored with networks of different station density, we present preliminary results indicating what fraction of seismic events may be amenable to analysis with modern methods. The latter can supply locations ten to a hundred times more precise than traditional methods. Since good locations of seismic sources are needed as the starting point for so many user communities, and potentially can be provided due to current improvements in easily-accessible computational capability, we advocate wide-scale application of modern methods in the routine production of bulletins of seismicity. This effort requires access to waveform archives from well-calibrated stations that have long operated at the same location.


026QQTimes Cited:6Cited References Count:34

DOI  DOI 10.1007/s00024-005-0019-5