Real-time testing of the on-site warning algorithm in southern California and its performance during the July 29 2008 Mw5.4 Chino Hills earthquake

The real‐time performance of the τc‐Pd on‐site early warning algorithm currently is being tested within the California Integrated Seismic Network (CISN). Since January 2007, the algorithm has detected 58 local earthquakes in southern California and Baja with moment magnitudes of 3.0 ≤ Mw ≤ 5.4. Comb...

Full description

Saved in:
Bibliographic Details
Published in:Geophysical research letters 2009-03, Vol.36 (5), p.n/a
Main Authors: Böse, M., Hauksson, E., Solanki, K., Kanamori, H., Heaton, T. H.
Format: Article
Language:English
Subjects:
California
Chino Hills
earthquake early warning
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The real‐time performance of the τc‐Pd on‐site early warning algorithm currently is being tested within the California Integrated Seismic Network (CISN). Since January 2007, the algorithm has detected 58 local earthquakes in southern California and Baja with moment magnitudes of 3.0 ≤ Mw ≤ 5.4. Combined with newly derived station corrections the algorithm allowed for rapid determination of moment magnitudes and Modified Mercalli Intensity (MMI) with uncertainties of ±0.5 and ±0.7 units, respectively. The majority of reporting delays ranged from 9 to 16 s. The largest event, the July 29 2008 Mw5.4 Chino Hills earthquake, triggered a total of 60 CISN stations in epicentral distances of up to 250 km. Magnitude predictions at these stations ranged from Mw4.4 to Mw6.5 with a median of Mw5.6. The closest station would have provided up to 6 s warning at Los Angeles City Hall, located 50 km to the west‐northwest of Chino Hills.
ISSN:0094-8276
1944-8007
DOI:10.1029/2008GL036366