Near-surface velocities and attenuation at two boreholes near Anza, California, from logging data
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Abstract
To investigate near-surface site effects in granite rock, we drilled 300-m-deep boreholes at two sites which are collocated with stations from the digital array at Anza, California. The first borehole was sited at station KNW (Keenwild fire station), which is located along a ridge line about 8.7 km east of the San Jacinto Fault zone. Station PFO (Piñon Flat Observatory), chosen for the second site, is another 6 km further to the east of station KNW and is located on a gently sloping hillside. We logged each borehole for P- and S-wave velocities, as well as for crack density and orientation.
Study Area
Publication type | Article |
---|---|
Publication Subtype | Journal Article |
Title | Near-surface velocities and attenuation at two boreholes near Anza, California, from logging data |
Series title | Bulletin of the Seismological Society of America |
DOI | 10.1785/BSSA0800040807 |
Volume | 80 |
Issue | 4 |
Year Published | 1990 |
Language | English |
Publisher | Seismological Society of America |
Description | 25 p. |
First page | 807 |
Last page | 831 |
Country | United States |
State | California |
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