Source mechanics for monochromatic icequakes produced during iceberg calving at Columbia Glacier, AK
Geophysical Research Letters
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Abstract
Seismograms recorded during iceberg calving contain information pertaining to source processes during calving events. However, locally variable material properties may cause signal distortions, known as site and path effects, which must be eliminated prior to commenting on source mechanics. We applied the technique of horizontal/vertical spectral ratios to passive seismic data collected at Columbia Glacier, AK, and found no dominant site or path effects. Rather, monochromatic waveforms generated by calving appear to result from source processes. We hypothesize that a fluid-filled crack source model offers a potential mechanism for observed seismograms produced by calving, and fracture-processes preceding calving.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Source mechanics for monochromatic icequakes produced during iceberg calving at Columbia Glacier, AK |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/2007GL031370 |
| Volume | 34 |
| Issue | 22 |
| Year Published | 2007 |
| Language | English |
| Publisher | American Geophysical Union (AGU) |
| Publisher location | Washington, D.C. |
| Contributing office(s) | Alaska Science Center |
| Description | Unpaginated |
| Online Only (Y/N) | Y |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |