Association of subsurface radon changes in Alaska and the northeastern United States with earthquakes

Details Association of subsurface radon changes in Alaska and the northeastern United States with earthquakes Association of subsurface radon changes in Alaska and the northeastern United States with earthquakes

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985gecoa..49.1061f&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 49, Issue 4, pp.1061-1071

Computer Science

6

Scientific paper

Changes of radon concentration in the ground have been reported to correlate with seismic activity in many places over widely varying distances from the earthquake epicenters, sometimes over 100's and occasionally over 1000's of km depending on the magnitude M of the earthquakes. For proper use of such correlations in forecasting the location and size of impending earthquakes, it would be useful to establish a relation between M and the maximum distance x M at which radon can be significantly altered by preseismic effects. We have monitored radon in the ground continuously at Blue Mountain Lake, NY starting Dec. 3. 1975 and at three locations in Alaska--Icy Bay, Yakataga, and Sand Point (starting Nov. 12, 1979; March 5, 1980; and June 29, 1980 respectively). Sample correlations from visual examination of the recent radon record and tentative use of a proposed scaling relation show a number of possible earthquake-related signals at these locations. The data are compatible with scaling relations that were derived from two separate models of premonitory elastic strains. In this work x M = 10 0.48 M , where x M is in units of km and M 3. Since tilt and strain signals correlate similarly with magnitude and distance, it is likely that most earthquake-related radon signals are mechanically induced.

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