Investigation radon and helium as possible fluid-phase precursors to earthquakes

Abstract

This report includes new data on radon, helium, and other dissolved gases (N, Ar, CH^) in thermal wells and springs along our Southern California network, for the period October, 1979, to September, 1980. Additionally, since this is an annual report, complete tables and graphs of data measured from 1975 to the present are included as appendices. Temperature and conductivity graphs are also shown for most sites.