Magnitude 3.3 MOUNT ST. HELENS AREA, WASHINGTON
Friday, October 01, 2004 at 02:47:25 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
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Magnitude
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3.3
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Date-Time
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Friday, October 01, 2004 at 02:47:25 (UTC) - Coordinated Universal Time
Thursday, September 30, 2004 at 07:47:25 PM local time at epicenter
Time of Earthquake in other Time Zones
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Location
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46.20N 122.18W
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Depth
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1 kilometers
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Region
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MOUNT ST. HELENS AREA, WASHINGTON
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Reference
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60 km (35 miles) E of Longview, Washington
60 km (35 miles) SW of Packwood, Washington
110 km (65 miles) SSE of OLYMPIA, Washington
155 km (95 miles) S of Seattle, Washington
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Location Quality
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Error estimate not available, held by USGS NEIC to another agency's solution
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Location Quality Parameters
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not available
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Source
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SEA
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NB:
The official magnitude for this earthquake is indicated at the top of this page.
This was the best available estimate of the earthquake's size,
at the time that this page was created. Other magnitudes associated
with web pages linked from here are those determined at various times
following the earthquake with different types of seismic data.
Although, given the data used, they are legitimate estimates of magnitude
they are not considered the official magnitude.
The region name is an automatically generated name
from the Flinn-Engdahl (F-E) seismic and geographical regionalization scheme.
The boundaries of
these regions are defined at one-degree intervals and therefore differ from
irregular political boundaries.
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