Earthquake Report

Wooded Island swarm of 2009 starts with
Magnitude 1.9, N of Richland, WA
Saturday January 3, 2009 at 05:32:4.78 PM (PST)

Magnitude 1.9
Time Sunday January 4, 2009 at 01:32:4.78 Z (UTC)
Saturday January 3, 2009 at 05:32:4.78 PM (PST)
Distance from 13.8 km N of Richland, WA
24.1 km NW of Pasco, WA
200.3 km SW of Spokane, WA (Mission & N Division)
Coordinates 46.407 deg N
119.286 deg W
Depth 1 km
Quality fair (BC)
Note: 1 km = 0.621 mile or 1 mile = 1.61 km
Map showing epicenter
Name of Event File: 09010401314e

NOTE: This page is for an earthquake swarm, not just one event

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. No event in this swarm is large enough for a ShakeMap.

  • 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. Only four felt reports for one earthquake have been received.

    View Seismograms of station WIW for current time - View web-based seismograms by station and date.

    Tectonic summary - Brief interpretation for this swarm.

    Maps and History of Earthquakes in this Region

    Swarm Activity - The following information will be updated as new events occur. Included are:

    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