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Weekly Earthquake Reports
 
Seismo-Watch
Earthquake Alert Bulletin No: 97-178

 
Notations:
 
The Mammoth Lakes earthquake swarm was relatively quiet during most of the night with the frequency of activity ranging mostly between 0-7 events per hour. However, one pulse of 31 events occurred between 4-5 a.m. then quieted down to 0-3 events per hour thereafter.
 
Subtract 7 hours to obtain PDT or 4 hours for EDT
Location Quality: A (good), B (fair), C (poor), D (bad)
Magnitude: Ml (local or Richter magnitude), Lg (mblg), Md (duration), Mb (body wave), Ms (surface wave), Mw (moment)

Sources Include:
U.S. Geological Survey, National Earthquake Information Center, Golden, CO (NEIC)
Harvard Geophysical Observatory, Harvard University, Cambridge, MA (HRV)
International Data Center, Center for Monitoring Research, Arlington, VA (IDC)
California Institute of Technology, Pasadena, California (Caltech)
various wire reports and/or personal communications

All data are preliminary and subject to change.
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