Earthquake Report

Magnitude 3.8, N of Portland, OR
Thursday August 3, 2006 at 01:39:18.70 AM (PDT)

Magnitude 3.8
Time Thursday August 3, 2006 at 08:39:18.70 Z (UTC)
Thursday August 3, 2006 at 01:39:18.70 AM (PDT)
Distance from 30.5 km N of Portland, OR
44.6 km SE of Longview, WA
54.0 km SW of Mt St Helens, WA
Coordinates 45.809 deg N
122.610 deg W
Depth 12 km
Quality good (BB)
Note: 1 km = 0.621 mile or 1 mile = 1.61 km
Map showing epicenter
Name of Event File: 06080308391c

This is an automated web page produced after a significant earthquake to give essential information about the earthquake, its aftershocks, and previous earthquake activity in the region. Some of the information here will be updated as aftershocks occur.
  • SHAKE MAP list for PNSN - For certain earthquakes a map of shaking intensity based on measurements from strong-motion seismographs will be available.

  • DID YOU FEEL IT index search for PNSN - You can report shaking and damage at your location. You can also view a map displaying a summary of data received from all reports.

    View Seismograms - View web-based seismograms by station and date.

    Maps and History of Earthquakes in this Region

    Focal Mechanism - A diagram and table of the P-wave fault plane solution. If sufficient P-wave first motion data are available, a fault plane determination for the earthquake will be available.

    Strong-Motion Information - for some earthquakes a ShakeMap based on recorded data from digital accelerographs is available.

    Related Information - Most Up-to-Date Local and Global Earthquake Summaries