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Frequency-dependent attenuation of the Hispaniola Island region of the Caribbean Sea

Bulletin of the Seismological Society of America

By:
, , , , , , , , , , and
DOI: 10.1785/0120110137

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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.

Additional Publication Details

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