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Weekly Earthquake Reports
 
Seismo-Watch
Earthquake Alert Bulletin No: 97-173

Preliminary data indicates a significant earthquake has occurred:

Regional Location:

Preliminary Magnitude:

Moment Magnitude (Mw):

Greenwich Mean Date:
Greenwich Mean Time:
Latitude:
Longitude:
Focal Depth (km):
Analysis Quality (A-D):

VOLCANO ISLANDS REGION W. PACIFIC

5.9 Mb

5.8 (NEIC)

97/07/08
02:24:07
23.95N
142.70E
23 km
A
Notations:
An earthquake registering a preliminary magnitude of Mw 5.8 occurred at 02:24, July 8, south of Honshu, Japan, in the Volcano Islands. The quake was centered in the southern portion of the island group near Minami-Io Island.
 
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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