Spatial variations in the frequency-magnitude distribution of earthquakes at Soufriere Hills Volcano, Montserrat, West Indies
| dc.contributor | The University of the West Indies | |
| dc.creator | Power, John A. "et al." | |
| dc.date | 1998 | |
| dc.date.accessioned | 2018-03-14T14:13:48Z | |
| dc.date.available | 2018-03-14T14:13:48Z | |
| dc.description | The frequency-magnitude distribution of earthquakes measured by the b-value is determined as a function of space beneath Soufriere Hills Volcano, Montserrat, from data recorded between August 1, 1995 and March 31, 1996. A volume of anomalously high b-values (b > 3.0) with a 1.5 km radius is imaged at depths of 0 and 1.5 km beneath English's Crater and Chance's Peak. This high b-value anomaly extends southwest to Gage's Soufriere. At depths greater than 2.5 km volumes of comparatively low b-values (b∼1) are found beneath St. George's Hill, Windy Hill, and below 2.5 km depth and to the south of English's Crater. We speculate the depth of high b-value anomalies under volcanoes may be a function of silica content, modified by some additional factors, with the most siliceous having these volumes that are highly fractured or contain high pore pressure at the shallowest depths. | |
| dc.identifier.uri | https://hdl.handle.net/2139/45478 | |
| dc.source | Geophysical Research Letters, Vol. 25, No. 19, 3653-3656 | |
| dc.subject | Earthquakes | |
| dc.subject | Soufriere Hills Volcano | |
| dc.subject | Frequency magnitude | |
| dc.subject | b-values | |
| dc.title | Spatial variations in the frequency-magnitude distribution of earthquakes at Soufriere Hills Volcano, Montserrat, West Indies |
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