Interpretation of broad-band seismograms from central Aleutian earthquakes.
Annales Geophysicae, Series B
By: E.R. Engdahl and R. Kind
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Abstract
Broad-band Graefenberg (GRF) array data from 11 moderate-size shallow-depth earthquakes in the central Aleutians have been used to study the effects of focal depth and structure across the arc on observed waveforms. The theoretical results, primarily phase arrival times, suggest that arc structure is responsible for many of the complicated features seen on vertical-component summation seismograms simulated with different instrument responses from the broad-band array data. Except for one trench event, all the earthquakes studied occurred along the plate interface zone, had similar thrust focal mechanisms, and differed only in depth. As a result, the effects of depth phases on observed GRF waveforms across the arc were found to be systematically related to the increase in focal depth along the shallow-dipping seismic zone. -from Authors
Suggested Citation
Engdahl, E., Kind, R., 1986, Interpretation of broad-band seismograms from central Aleutian earthquakes.: Annales Geophysicae, Series B, v. 4 B, no. 3, p. 233-240.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Interpretation of broad-band seismograms from central Aleutian earthquakes. |
| Series title | Annales Geophysicae, Series B |
| Volume | 4 B |
| Issue | 3 |
| Year Published | 1986 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Annales Geophysicae, Series B |
| First page | 233 |
| Last page | 240 |