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Author Reimer, G. M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword GEOSCIENCES ♦ EARTHQUAKES ♦ FORECASTING ♦ HELIUM ♦ MONITORING ♦ ACCURACY ♦ ATMOSPHERIC PRECIPITATIONS ♦ DAILY VARIATIONS ♦ HUMIDITY ♦ PRESSURE DEPENDENCE ♦ SEISMICITY ♦ SOILS ♦ TEMPERATURE DEPENDENCE ♦ WIND ♦ ELEMENTS ♦ NONMETALS ♦ RARE GASES ♦ SEISMIC EVENTS ♦ VARIATIONS ♦ Geophysics- Seismology & Tectonics- (1980-1989)
Abstract The diurnal variations in soil-gas helium concentration have been monitored at depths of 0.5--2.0 m in three localities in Colorado, Wyoming, and California. Barometric pressure, air temperature, wind speed, soil temperature and moisture, relative humidity, and precipitation were also measured. The helium variation below a 1-m sampling depth usually did not exceed the analytical sensityivity of 10 ppM He. The meteorologic parameters that have the greatest effect on helium variation are wind speed and precipitation; another factor is the atmospheric pumping created by air temperature changes and its associated effect on near-surface soil moisture content. The absolute helium variation rarely exceeds 1% of the back-ground helium concentration in air and can easily be compensated for because it follows a regular daily pattern. Similar diurnal changes in soil-gas helium concentration would not impose any severe limitations on the use of these data for earthquake prediction purposes.
Educational Use Research
Learning Resource Type Article
Publisher Date 1980-06-10
Publisher Department U. S. Geological Survey, Denver, Colorado 80225
Publisher Place United States
Journal J. Geophys. Res.
Volume Number 85
Issue Number B6
Organization U. S. Geological Survey, Denver, Colorado 80225


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