Geophysical investigations of the Western Ohio-Indiana region. Annual report, October 1981-September 1982
Earthquake activity in the Western Ohio-Indiana region is monitored with a precision seismograph network: Nine stations clustered about Anna, Ohio, and four stations in Indiana centered about Indianapolis. During this period no earthquakes were detected in the region of the network. This seismic inactivity contrasts with the previous year, during which nine small (unfelt) earthquakes occurred within and adjacent to the Western Ohio portion of the network. Digital triggering and recording capability was added to the analog recording capability. Using the new digital capability, we were able to more precisely locate the focus of some of these small earthquakes. As part of the inception of a modeling investigation, a preliminary location of the Grenville Front was postulated as eastward of the network. Azimuthal changes in travel time residuals of teleseisms were used for this estimate.
- Research Organization:
- Nuclear Regulatory Commission, Washington, DC (USA). Office of Nuclear Regulatory Research
- OSTI ID:
- 5981134
- Report Number(s):
- NUREG/CR-3145-Vol.1; ON: DE83901400
- Resource Relation:
- Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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