Seismic Database in Support of Regional Monitoring Research in Asia
LA-UR-99-3000Julio Aguilar-Chang, Aaron A. Velasco, and Hans E. Hartse
Los Alamos National Laboratory
Goal
Improved ability to locate, characterize, and discriminate small magnitude events recorded at regional distances.
Content
- Earthquake catalogs
- Waveforms for reference and catalog events
- Travel-time tables and 2-D corrections surfaces
- Preliminary ground truth events
- Regional magnitude calibration
- Regional station information
Catalog Data Sources
| USGS PDE | 1/1973 - 12/1989 | 147,817 events |
| USGS EDR | 1/1990 - 1/1998 | 156,244 events |
| USGS Weekly PDE | 2/1998 - 2/1999 | 21,561 events |
| pIDC REB | 5/1993 - 11/1998 | 84,689 events |
| ISC | 1/1986 - 12/1995 | 945,913 events |
Waveform Data Source
Most waveforms were obtained from the Incorporated Research Institutions for Seismology
(IRIS), Data Management Center (DMC).
Design
- CSS 3.0 format
- Oracle RDBMS version 7.3.3
- Sun Solaris 2.5 platform
Processing Results
- 20 gigabytes of data
- 200 reference tables
- 400,000 distinct events
- 128,120 pointers to SAC waveform files
- 3.5 million regional amplitude measurements
Utility for Research
- Development of empirical propagation path corrections (PPCs) using earthquake catalogs within the database by Steck et. al.
- Development of amplitude corrections in 1-D and 2-D by Taylor et al. and Phillips et. al.