Frequency-dependent attenuation of the Hispaniola Island region of the Caribbean Sea
Bulletin of the Seismological Society of America
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Abstract
We determine frequency-dependent attenuation 1/Q(f) for the Hispaniola region using direct S and Lg waves over five distinct passbands from 0.5 to 16 Hz. Data consist of 832 high-quality vertical and horizontal component waveforms recorded on short-period and broadband seismometers from the devastating 12 January 2010 M 7.0 Haiti earthquake and the rich sequence of aftershocks. For the distance range 250–700 km, we estimate an average frequency-dependent Q(f)=224(±27)f0.64(±0.073) using horizontal components of motion and note that Q(f) estimated with Lg at regional distances is very consistent across vertical and horizontal components. We also determine a Q(f)=142(±21)f0.71(±0.11) for direct S waves at local distances, ≤100 km. The strong attenuation observed on both vertical and horizontal components of motion is consistent with expectations for a tectonically active region.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Frequency-dependent attenuation of the Hispaniola Island region of the Caribbean Sea |
| Series title | Bulletin of the Seismological Society of America |
| DOI | 10.1785/0120110137 |
| Volume | 102 |
| Issue | 2 |
| Year Published | 2012 |
| Language | English |
| Publisher | Seismological Society of America |
| Publisher location | El Cerrito, CA |
| Contributing office(s) | Geologic Hazards Science Center |
| Description | 10 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Bulletin of the Seismological Society of America |
| First page | 773 |
| Last page | 782 |
| Other Geospatial | Caribbean Sea;Hispaniola |
| Google Analytic Metrics | Metrics page |