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A strong-motion accelerograph, an instrument used to measure the accelerations due to earthquake waves shaking the ground or structures Picture

A strong-motion accelerograph, an instrument used to measure the accelerations due to earthquake waves shaking the ground or structures

A strong-motion accelerograph, an instrument used to measure the accelerations due to earthquake waves shaking the ground or structures. The accompanying record was of the Helena, Montana earthquake of October 31, 1935. In: Bulletin of the Geological Society of America, Vol. 49., No. 1, pp. 1-21.

Photo Category: Coast and Geodetic Survey - Geophysics Seismology
Photo Date: 1936 ca.

Author: Collected Papers of Captain Nicholas Heck, NOAA Central Library/ NOAA

License: Public Domain Mark 1.0 (Public domain)
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16th October 2015
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