Note that the epicenters shown here are preliminary. This area in southeast Oregon has few seismographs and falls outside of the earthquake region that the PNSN normally covers (this area is normally covered by the NEIC ). However, to make the epicenter map as accurate as possible we have integrated seismic data from the PNSN, the USGS, and the University of California, Berkeley. The map below, showing routinely processed locations, indicates an apparent N-S scatter of epicenters that is misleading. The N-S scatter is caused by the fact that most seismograph stations are located to the west; there are very few seismic stations north and south of the epicenters in this region. A more careful analysis shows that almost all of the epicenters are actually located at one spot.

• An Earthquake Catalog listing the location and magnitude of all earthquakes we have located in the epicentral region (including the mainshock and any aftershocks) for the current year.
  
• Seismic Activity as a function of time in the epicentral region since the time of the mainshock.

Did You Feel It? - 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

• A map of the Pacific Northwest showing the location of the mainshock (in red) plus prior earthquakes M > 3.0. Shallow events are black. Events deeper than 35 km are green.
  
• A map showing a closer view of the earthquake and prior historical earthquakes with magnitude 3.0 or greater. Shallow events are black. Events deeper than 35 km are green.
  
• A list of 10 big earthquakes preceding the mainshock that are closest to it and have a magnitude greater than 4.0. These are the most significant historical earthquakes in the vicinity of the mainshock (see closer view map above).
  
• A map showing the location of the mainshock relative to cities.
  
• A map showing the location of the mainshock relative to the nearest seismograph stations that recorded it.
  
• A general map of significant historical earthquake locations in the Pacific Northwest.
  
• A detailed list of all earthquakes (M > 1.5) that occurred in the two years prior to the mainshock in the area shown on the next map.
  
• A map of all earthquakes (M > 1.5) that occurred in the two years prior to the mainshock. Detailed area shown is just few kilometers around the mainshock.
  
• A list of the nearest 20 strong motion sites
  

Focal Mechanism - Information for this earthquake.

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

• Latest Quakes from the Pacific Northwest, the nation and the world