Magnitude	2.8
	Date-Time	Wednesday, September 29, 2004 at 18:47:56 (UTC) - Coordinated Universal Time Wednesday, September 29, 2004 at 11:47:56 AM local time at epicenter Time of Earthquake in other Time Zones
	Location	46.20N 122.19W
	Depth	1 kilometers
	Region	MOUNT ST. HELENS AREA, WASHINGTON
	Reference	60 km (35 miles) E of Longview, Washington 60 km (40 miles) SW of Packwood, Washington 110 km (65 miles) SSE of OLYMPIA, Washington 155 km (95 miles) S of Seattle, Washington
	Location Quality	Error estimate not available, held by USGS NEIC to another agency's solution
	Location Quality Parameters	not available
	Source	SEA

Location Map Did You Feel It? Report shaking and damage at your location. You can also view a map displaying accumulated data from your report and others. Historical Seismicity Theoretical P-Wave Travel Times Historical Moment Tensor Solutions Seismic Hazard Map USGS National Seismic Hazard Mapping Project Current information about the rate at which earthquakes occur in different areas, and on how far strong shaking extends from the earthquake source. Earthquake Information for WASHINGTON Earthquakes: Frequently Asked Questions

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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. More->