Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published July 1942 | Published
Journal Article Open

Earthquake magnitude, intensity, energy, and acceleration

Abstract

The magnitude of an earthquake was originally defined by the junior author (Richter, 1935), for shocks in southern California, as the logarithm of the maximum trace amplitude expressed in thousandths of a millimeter with which the standard short-period torsion seismometer (free period 0.8 sec., static magnification 2800, damping nearly critical) would register that earthquake at an epicentral distance of 100 kilometers. Gutenberg and Richter (1936) extended the scale to apply to earthquakes occurring elsewhere and recorded on other types of instruments.

Additional Information

Copyright © 1942, by the Seismological Society of America. Manuscript received for publication January 29, 1942.

Attached Files

Published - 163.full.pdf

Files

163.full.pdf
Files (1.5 MB)
Name Size Download all
md5:f9433cf30df3c7d732032ef79efd7929
1.5 MB Preview Download

Additional details

Created:
August 19, 2023
Modified:
August 19, 2023