Effects of the 1983 Idaho Earthquake on the Little Antelope Flat Warm Spring
- Key words
- Direct Use; Exploration; USA; Idaho; Thermal Springs; Aquifer; Fractures; Hydrology; Earthquakes
- Location
- Little Antelope Flat, Idaho
- Conference
- Geothermal Resources Council Transactions
- Year
- 1984
- Session
- Seismicity; Thermal springs; Hydrogeology
- Language
- English
Abstract
The Mt. Borah Earthquake of October 28, 1983 caused rather abrupt changes in the water flow system on the Little Antelope Flats Warm Spring in central Idaho. A group of warm springs that had been flowing at 6 cfs completely ceased for a period of 8 days after the earthquake. The springs have since been increasing in flow and were measured at 57 cfs in March, 1984. Mechanisms which could account for the change in spring flowage are postulated to be one or ore of the following: regional tilting increasing hydrostatic head, increase in permeability produced by fracturing produced by pressure pulse, or reservoir dilation from internal stresses. Studies are planned during the spring and summer months to gather the needed data to help understand the earthquake induced mechanisms reasonable for the drastic changes in flow of the geothermal system.
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