Earthquake surveys of the Roosevelt Hot Springs and the Cove Fort areas, Utah. Volume 4. Final report

Technical Report · Fri Oct 01 04:00:00 EDT 1976

OSTI ID:7289667

Olson, T L; Smith, R B

Forty-nine days of earthquake monitoring around the Roosevelt Hot Springs KGRA during 1974 and 1975 indicates little earthquake activity and no correlation with the Hot Springs area. Marked earthquake activity, however, was located 25 km east within the Cove Fort-Sulphurdale KGRA. A total of 163 earthquakes were located from the two surveys. Focal depths for the Cove Fort area were shallow with 75% of the activity less than 5 km in depth. The maximum calculated depth was 16 km. Composite fault plane solutions in the Cove Fort area showed normal faulting with generally east-west trending T-axes. A high b-value of 1.27 and a statistical analysis using the Kolomogorov model of event occurrence imply swarm-like activity near Cove Fort. Consistently positive P-wave residuals of up to 0.10 sec and detectable S-wave attenuation of ray paths across the Mineral Range are suggestive of the possibility of an upper-crustal zone of high attentuation that is perhaps related to the source of heat of the Roosevelt Hot Springs KGRA.

• Research Organization: Utah Univ., Salt Lake City (USA). Dept. of Geology and Geophysics
• OSTI ID: 7289667
• Report Number(s): PB-268421
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150201* -- Geology & Hydrology of Geothermal Systems-- USA-- (-1989)
EARTHQUAKES
GEOLOGIC FAULTS
GEOLOGIC STRUCTURES
GEOPHYSICAL SURVEYS
GEOTHERMAL FIELDS
HEAT SOURCES
HOT SPRINGS
KGRA
NORTH AMERICA
SEISMIC EVENTS
SEISMIC P WAVES
SEISMIC S WAVES
SEISMIC SURVEYS
SEISMIC WAVES
THERMAL SPRINGS
USA
UTAH