This information will be updated as needed. Our data base of earthquake hypocenters contains information from the 19th century to the present. A Intermediate scale map showing the location of the earthquake and prior historical earthquakes with magnitude 3.5 or greater. A list of 10 big earthquakes preceding the mainshock that are closest to it and have a magnitude greater than 3.5. For the locations of these events see the next map.
Detailed area shown is just few kilometers around the mainshock.
In some cases more than one solution may fit the data. This earthquake did not trigger the UW strong-motion sensors. However, we can provide peak accelerations and accelerograms recorded on broadband velocity sensors. As of June 26 we have received 21 responses specifically for this Okanogan earthquake, in addition to several hundred for the other quakes that occurred recently. A preliminary summary of these responses will be updated as we receive more reports.