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  • Hydrofracture  (1)
  • Intersection model  (1)
Document type
Keywords
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  • 1
    Electronic Resource
    Electronic Resource
    Stress distribution near lake Jocassee, South Carolina (1977)
    Springer
    Pure and applied geophysics 115 (1977), S. 275-281 
    Details
    ISSN: 1420-9136
    Keywords: Fault plane solutions ; Hydrofracture ; Seismicity at reservoir
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Seven months of seismic monitoring near Jocassee reservoir (impounded 1974) resulted in the detection of four clusters of earthquake activity. Composite fault plane solutions (CFPS) for each cluster indicate strike slip faulting for shallow earthquakes (〈1.0 km) on the shores of the reservoir and normal faulting for deeper events (1–3 km) in the middle of the reservoir. The directions of the axes of maximum and minimum compression inferred from the CFPS were found to be NW and NE respectively and contrast with the NE and NW directions obtained by hydrofracture in a shallow well (230 m) at Bad Creek, about 10 km from the epicentral region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01637109
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Speculation on the causes of continuing seismicity near Koyna reservoir, India (1995)
    Springer
    Pure and applied geophysics 145 (1995), S. 167-174 
    Details
    ISSN: 1420-9136
    Keywords: Intersection model ; continuing seismicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The cause for continuous induced seismicity at Koyna is not well understood. A heuristic model based on various physical parameters observed at Koyna is being proposed to explain the ongoing seismicity. This model contains two essential elements: (i) Intersecting faults near Koyna provide means of stress build-up in response to plate tectonic forces. (ii) The annual reservoir loading cycle and changes in the ground water table perturb this stress build-up by an influx of pore pressure in a fluid infiltrated medium. Hence, the spatial and temporal pattern of the pore prussure distribution and the seismicity will be governed by the location and hydromechanical properties of the faults and fractures. The predictions of the model can be tested by comparing the temporal and spatial pattern of seismicity with the changes in lake level and water table.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00879492
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
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