Earthquake Report

Magnitude 4.6, N of Okanogan, WA
Friday November 18, 2011 at 05:09:0.98 AM (PST)

Magnitude 4.6
Time Friday November 18, 2011 at 13:09:0.98 Z (UTC)
Friday November 18, 2011 at 05:09:0.98 AM (PST)
Distance from 11.6 km N of Okanogan, WA
74.0 km NW of Grand Coulee, WA
186.3 km WNW of Spokane, WA (Mission & N Division)
Coordinates 48.469 deg N
119.608 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: 11111813090n

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