Seismological investigation of crack formation in hydraulic rock fracturing experiments and in natural geothermal environments. Progress report, September 1, 1978-August 31, 1979

Technical Report · Sat Sep 01 04:00:00 EDT 1979

DOI:https://doi.org/10.2172/5930462· OSTI ID:5930462

Aki, K

An interpretation theory based on the fluid-filled crack model of geothermal systems is being developed and tested against a variety of data from various geothermal areas. Progress is reported on the following subjects: (1) analysis and interpretation of seismic data obtained from the bore holes at the LASL Hot Dry Rock geothermal site. (2) Collection, analysis and interpretation of data on deep volcanic tremors at the USGS Hawaii Volcano Observatory. (3) Development of a new method for determining seismic attenuation at frequencies higher than 1HZ, and initiation of a cooperative work with Mexican seismologists on the attenuation measurements at various geothermal areas in Baja, California using the method. (4) Installation of 3-component digital event-recorders at four stations in the Newberry Peak volcano, Oregon. (5) Developing a computer program for calculating seismic motion generated by the vibration of fluid-filled crack in a layered medium.

• Research Organization: Massachusetts Inst. of Tech., Cambridge (USA)
• DOE Contract Number: EY-76-S-02-2534
• OSTI ID: 5930462
• Report Number(s): COO-2534-5
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
COMMINUTION
COMPUTER CODES
CRACKS
FAILURES
FRACTURES
FRACTURING
GEOPHYSICAL SURVEYS
GEOTHERMAL SYSTEMS
Geothermal Legacy
HAWAII
HOT-DRY-ROCK SYSTEMS
HYDRAULIC FRACTURING
LATIN AMERICA
MATHEMATICAL MODELS
MEXICO
NORTH AMERICA
OREGON
PACIFIC NORTHWEST REGION
SEISMIC SURVEYS
SEISMIC WAVES
USA
VOLCANIC REGIONS
VOLCANOES
WESTERN REGION