Skip to Main Content
GEOREF RECORD

"Did you feel it?" Intensity data; a surprisingly good measure of earthquake ground motion

Gail M. Atkinson and David J. Wald
"Did you feel it?" Intensity data; a surprisingly good measure of earthquake ground motion
Seismological Research Letters (June 2007) 78 (3): 362-368

Abstract

The U.S. Geological Survey is tapping a vast new source of engineering seismology data through its "Did You Feel It?" (DYFI) program, which collects online citizen responses to earthquakes. To date, more than 750,000 responses have been compiled in the United States alone. The DYFI data make up in quantity what they may lack in scientific quality and offer the potential to resolve longstanding issues in earthquake ground-motion science. Such issues have been difficult to address due to the paucity of instrumental ground-motion data in regions of low seismicity. In particular, DYFI data provide strong evidence that earthquake stress drops, which control the strength of high-frequency ground shaking, are higher in the central and eastern United States (CEUS) than in California. Higher earthquake stress drops, coupled with lower attenuation of shaking with distance, result in stronger overall shaking over a wider area and thus more potential damage for CEUS earthquakes in comparison to those of equal magnitude in California--a fact also definitively captured with these new DYFI data and maps.


ISSN: 0895-0695
EISSN: 1938-2057
Serial Title: Seismological Research Letters
Serial Volume: 78
Serial Issue: 3
Title: "Did you feel it?" Intensity data; a surprisingly good measure of earthquake ground motion
Affiliation: University of Western Ontario, Department of Earth Sciences, London, ON, Canada
Pages: 362-368
Published: 200706
Text Language: English
Publisher: Seismological Society of America, El Cerrito, CA, United States
References: 22
Accession Number: 2007-113856
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch maps
Secondary Affiliation: U. S. Geological Survey, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200722
Program Name: USGSOPNon-USGS publications with USGS authors
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal