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pl23_cgs02169.jpg

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

Image

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Description

A strong-motion accelerograph, an instrument used to measure the accelerationsdue to earthquake waves shaking the ground or structures. The accompanyingrecord 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.

Credit

Collected Papers of Captain Nicholas Heck, NOAA Central Library

Display Date

1936 ca.

Collection

Historic Coast & Geodetic Survey

Keywords

Coast and Geodetic Survey

Geophysics Seismology