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Title: Analysis of strong-motion data from the New Hampshire earthquake of 18 January 1982
Authors: U.S. Nuclear Regulatory Commission.
Chang, Frank K.
Keywords: Eastern United States Seismicity
New Hampshire
Strong-motion data
Publisher: Geotechnical Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; GL-84-19.
Description: Miscellaneous Paper
Abstract: This report provides and presents an analysis of the strong-motion data from the New Hampshire earthquake of 18 January 1982 latitude 43.5°N, longitude 71.6°W. Thirty- six accelerograms were recorded and digitized. The digitized accelerograms were processed by the us Geological Survey, to provide baseline correction. The integrated velocities and displacements are presented in graphic form. The attenuation curves of the three orthogonal components for peak acceleration, peak velocity, peak displacement, and velocity spectrum intensity on the crest, abutment, and downstream sites of the five US Army Corps of Engineers earth dams were plotted and compared. The transverse component at the Franklin Falls Dam shows the highest energy. However, its attenuation rate is faster than the vertical and longitudinal components. The transverse component of the accelerograph located on the right abutment of Franklin Falls Dam (8 km from the epicenter) recorded a maximum acceleration of 0.55 g's, which is the highest acceleration ever recorded in the eastern United States. The integrated maximum velocity is 5.59 cm/sec, which is very low in comparison with other earthquake records in the western United States.
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