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Weekly Earthquake Reports
 
Seismo-Watch
Earthquake Alert Bulletin No: 97-191

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):

ARGENTINA/BOLIVIA BORDER

6.0 Mb

(n/a)

97/07/20
10:14:23
22.69S
66.02W
256.5 km
A
Notations:
An earthquake occurred registering a preliminary magnitude of Mb 5.0 occurred at 10:14 UTC, July 20, along the Argentina/Bolivia border. The quake triggered at a depth of 256 km and was centered about 110 miles northwest of Salta in the northern Jujuy Province. There has been no reports from the region as of yet.
 
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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