Near-field ground motion of the 2002 Denali fault, Alaska, earthquake recorded at pump station 10
Earthquake Spectra
By: W.L. Ellsworth, M. Çelebi, J.R. Evans, E.G. Jensen, R. Kayen, M.C. Metz, D.J. Nyman, J.W. Roddick, P. Spudich, and C.D. Stephens
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Abstract
A free-field recording of the Denali fault earthquake was obtained by the Alyeska Pipeline Service Company 3 km from the surface rupture of the Denali fault. The instrument, part of the monitoring and control system for the trans-Alaska pipeline, was located at Pump Station 10, approximately 85 km east of the epicenter. After correction for the measured instrument response, we recover a seismogram that includes a permanent displacement of 3.0 m. The recorded ground motion has relatively low peak acceleration (0.36 g) and very high peak velocity (180 cm/s). Nonlinear soil response may have reduced the peak acceleration to this 0.36 g value. Accelerations in excess of 0.1 g lasted for 10 s, with the most intense motion occurring during a 1.5-s interval when the rupture passed the site. The low acceleration and high velocity observed near the fault in this earthquake agree with observations from other recent large-magnitude earthquakes. ?? 2004, Earthquake Engineering Research Institute.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Near-field ground motion of the 2002 Denali fault, Alaska, earthquake recorded at pump station 10 |
| Series title | Earthquake Spectra |
| DOI | 10.1193/1.1778172 |
| Volume | 20 |
| Issue | 3 |
| Year Published | 2004 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Earthquake Spectra |
| First page | 597 |
| Last page | 615 |
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