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Interpretation of broad-band seismograms from central Aleutian earthquakes.

Annales Geophysicae, Series B

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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

Additional Publication Details

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
Number of Pages:
8