Abstract
We show how vertical downhole distributed acoustic sensing arrays can be used for P- and S- velocity analysis along the array. Using such velocity models, the array can be used in an effective moveout-based earthquake detection approach. We demonstrate both applications on 20 days of passive records at the San Andreas Fault Observatory at Depth, which comprises of a ~800 m deep vertical array. Estimated P velocities are comparable to an active geophone survey and S velocities are extracted for the first time in the area. Over 75% of the events in the USGS catalog in the area are detected, as well as a new earthquake.
Original language | English |
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Pages | 989-993 |
Number of pages | 5 |
DOIs | |
State | Published - 2020 |
Externally published | Yes |
Event | Society of Exploration Geophysicists International Exposition and Annual Meeting 2019, SEG 2019 - San Antonio, United States Duration: 15 Sep 2019 → 20 Sep 2019 |
Conference
Conference | Society of Exploration Geophysicists International Exposition and Annual Meeting 2019, SEG 2019 |
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Country/Territory | United States |
City | San Antonio |
Period | 15/09/19 → 20/09/19 |