Identification of earthquakes and explosions by use of teleseismic data
| Autor: | J. F. Evernden |
|---|---|
| Rok vydání: | 1969 |
| Předmět: |
Atmospheric Science
Ecology Basis (linear algebra) Paleontology Soil Science Magnitude (mathematics) Forestry Geophysics Aquatic Science Oceanography Frequency spectrum Identification (information) Space and Planetary Science Geochemistry and Petrology Depth of focus (tectonics) Earth and Planetary Sciences (miscellaneous) Geology Identification criteria Seismology Order of magnitude Earth-Surface Processes Water Science and Technology |
| Zdroj: | Journal of Geophysical Research. 74:3828-3856 |
| ISSN: | 0148-0227 |
| Popis: | Criteria for achieving an order of magnitude discrimination between underground explosions and shallow-focus continental earthquakes are presented. The basis of all these criteria is the gross difference between earthquakes and explosions as regards their relative generation of short- and long-period waves. It is also shown that depth of focus of small events can be accurately determined either by use of master-controlled travel-time corrections or by determination of time of origin (Pg, S-P, etc.). Therefore, the basic problem for differentiating earthquakes and underground explosions of magnitude 4¾ or greater by seismic criteria has been solved. The remaining problems are the detection of long-period waves at low signal-to-noise ratios and the evaluation of the applicability of long-period identification criteria for low-magnitude events. |
| Databáze: | OpenAIRE |
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