Earthquake Report

Magnitude 3.3, W of Darrington, WA
Thursday August 18, 2011 at 11:54:59.30 PM (PDT)

Magnitude 3.3
Time Friday August 19, 2011 at 06:54:59.30 Z (UTC)
Thursday August 18, 2011 at 11:54:59.30 PM (PDT)
Distance from 19.1 km W of Darrington, WA
21.5 km NNE of Granite Falls, WA
81.7 km NNE of Seattle, WA (1st & Yesler)
Coordinates 48.263 deg N
121.859 deg W
Depth 13 km
Quality fair (CA)
Note: 1 km = 0.621 mile or 1 mile = 1.61 km
Map showing epicenter
Name of Event File: 11081906545p

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