Noise in Earthquake Accelerograms

by Vincent W. Lee, Research Asst. Prof.; Dept. of Civ. Engrg., Univ. of Southern California, Los Angeles, Calif. 90007,
Mahailo D. Trifunac, Prof.; Dept. of Civ. Engrg., Univ. of Southern California, Los Angeles, Calif. 90007,
Ali Amini, Grad. Student; Dept. of Civ. Engrg., Univ. of Southern California, Los Angeles, Calif. 90007,


Serial Information: Journal of the Engineering Mechanics Division, 1982, Vol. 108, Issue 6, Pg. 1121-1129


Document Type: Journal Paper

Abstract: The amplitudes of processing and digitization noise in strong motion earthquake accelerograms are reviewed for hand and automatic digitization. By finding the period bands for which the signal-to-noise ratio in digitized accelerograms is greater than one, dependence of cut-off periods for accelerogram data processing is presented for amplitude scaling in terms of: (1) Earthquake magnitude and epicentral distance; and (2) modified mercalli intensity at the recording site.

Subject Headings: Data processing | Earthquakes | Ground motion | Automation | Signal processing | Fouling | Earthquake magnitude scale

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