Demonstration of the Cascadia G-FAST Geodetic Earthquake Early Warning System for the Nisqually, Washington, Earthquake

被引：82

作者：

Crowell, Brendan W. ^{[1
]}

Schmidt, David A. ^{[1
]}

Bodin, Paul ^{[1
]}

Vidale, John E. ^{[1
]}

Gomberg, Joan ^{[2
]}

Hartog, J. Renate ^{[1
]}

Kress, Victor C. ^{[1
]}

Melbourne, Timothy I. ^{[3
]}

Santillan, Marcelo ^{[3
]}

Minson, Sarah E. ^{[4
]}

Jamison, Dylan G. ^{[5
]}

机构：

[1] Univ Washington, Dept Earth & Space Sci, Johnson Hall Room 070,Box 351310 4000 15th Ave NE, Seattle, WA 98195 USA

[2] Univ Washington, Earthquake Sci Ctr, US Geol Survey, Johnson Hall Room 070,Box 351310 4000 15th Ave NE, Seattle, WA 98195 USA

[3] Cent Washington Univ, Dept Geol Sci, 400 E Univ Way,MS 7418, Ellensburg, WA 98926 USA

[4] US Geol Survey, Earthquake Sci Ctr, 345 Middlefield Rd,MS 977, Menlo Pk, CA 94025 USA

[5] Univ Waterloo, Dept Earth & Environm Sci, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada

来源：

SEISMOLOGICAL RESEARCH LETTERS | 2016年 / 87卷 / 04期

关键词：

MOMENT TENSOR; STATIC DISPLACEMENTS; SURFACE DEFORMATION; HALF-SPACE; GPS DATA; CALIFORNIA; PARAMETERS; NETWORKS; SHAKING; ROBUST;

D O I：

10.1785/0220150255

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

A prototype earthquake early warning (EEW) system is currently in development in the Pacific Northwest. We have taken a two-stage approach to EEW: (1) detection and initial characterization using strong-motion data with the Earthquake Alarm Systems (ElarmS) seismic early warning package and (2) the triggering of geodetic modeling modules using Global Navigation Satellite Systems data that help provide robust estimates of large-magnitude earthquakes. In this article we demonstrate the performance of the latter, the Geodetic First Approximation of Size and Time (G-FAST) geodetic early warning system, using simulated displacements for the 2001 M-w 6.8 Nisqually earthquake. We test the timing and performance of the two G-FAST source characterization modules, peak ground displacement scaling, and Centroid MomentTensor-driven finite-fault-slip modeling under ideal, latent, noisy, and incomplete data conditions. We show good agreement between source parameters computed by G-FAST with previously published and postprocessed seismic and geodetic results for all test cases and modeling modules, and we discuss the challenges with integration into the U.S. Geological Survey's ShakeAlert EEWsystem.

引用

页码：930 / 943

页数：14

共 36 条

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