abstract

A quantitative measure of the Modified Mercalli Intensity Scale for earthquakes in the western United States has been developed by correlating the peak seismoscope relative displacement response, Sd, with the reported site intensity, IMM. This correlation can be approximated by

 
S̄d(cm)149.2100.288IMM

for IMM ≦ VIII and is characterized by one standard deviation of about 0.7 d. The data used in this study do not indicate an obvious type of dependence of Sd on local site conditions.

A method for computing the analog of the local earthquake magnitude, Mseismoscope, has been presented for possible use in strong-motion seismology and for scaling earthquakes by close-in measuremients, when other seismological instruments may go off scale.

First Page Preview

First page PDF preview
You do not currently have access to this article.