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At high frequencies f the spectrum of S-wave accelerations is characterized by a trend of exponential decay, e^(−πkf). In our study, the spectral decay parameter k shows little variation at a singleExpand
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Intensity, magnitude, location and attenuation in India for felt earthquakes since 1762
A comprehensive, consistently interpreted new catalog of felt intensities for India (Martin and Szeliga, 2010, this issue) includes intensities for 570 earth- quakes; instrumental magnitudes andExpand
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On the Modified Mercalli intensities and magnitudes of the 1811–1812 New Madrid earthquakes
We reexamine original felt reports from the 1811–1812 New Madrid earthquakes and determine revised isoseismal maps for the three principal mainshocks. In many cases we interpret lower values thanExpand
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Remotely Triggered Seismicity on the United States West Coast following the Mw 7.9 Denali Fault Earthquake
The Mw 7.9 Denali fault earthquake in central Alaska of 3 November 2002 triggered earthquakes across western North America at epicentral distances of up to at least 3660 km. We describe the spatialExpand
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Toward a consistent model for strain accrual and release for the New Madrid Seismic Zone, central United States
[1] At the heart of the conundrum of seismogenesis in the New Madrid Seismic Zone is the apparently substantial discrepancy between low strain rate and high recent seismic moment release. In thisExpand
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A Terrain‐Based Site‐Conditions Map of California with Implications for the Contiguous United States
Abstract We present an approach based on geomorphometry to predict material properties and characterize site conditions using the V S 30 parameter (time‐averaged shear‐wave velocity to a depth of 30Expand
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Attenuation near Anza, California
Abstract Data from the Anza array in southern California have been analyzed to study attenuation. The data set includes records from 68 earthquakes, each of which recorded at an average of 4 to 5Expand
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Ground Motions from the 2015 Mw 7.8 Gorkha, Nepal, Earthquake Constrained by a Detailed Assessment of Macroseismic Data
ABSTRACT To augment limited instrumental recordings of the M w  7.8 Gorkha, Nepal, earthquake on 25 April 2015 (Nepali calendar: 12 Baisakh 2072, Bikram Samvat), we collected 3831 detailed media andExpand
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Localized damage caused by topographic amplification during the 2010 M 7.0 Haiti earthquake
Microzonation maps use local geological conditions to characterize seismic hazard, but do not generally consider topography. Ground motions during the Haiti earthquake are found to have beenExpand
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Seismic Hazard in Karachi, Pakistan: Uncertain Past, Uncertain Future
The city of Karachi, Pakistan (population 14 million), sits close to a plate boundary and within reach of earthquakes on numerous tectonically active structures surrounding the city. One can drawExpand
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