According to the Pacific Northwest Seismic Network, the first of two earthquakes occurred at 9:15am at a depth of 14.7 miles with a magnitude of 3.0. The epicenter was located underwater between Whidbey Island and Port Townsend, located at the northeast tip of the Olympic Peninsula.
No damage or tsunami was reported after the earthquake.
A second quake in the same approximate location occurred two minutes later. It was recorded as having a magnitude of 1.6 and a depth of 14.3 miles.
A stronger 4.7 magnitude earthquake is reported to have occurred at a depth of 13.7 miles in the approximately the same location in 1976.