At 5:02 a.m., a 4.5 magnitude earthquake struck near the town of Olga on Orcas Island, according to the Pacific Northwest Seismic Network (PNSN). The preliminary magnitude was 4.6. Of course, people who live on Orcas and other islands in the San Juans felt the most severe effects of the quake.

Shaking was felt across northwestern Washington early Monday morning as an earthquake struck the San Juan Islands region near the border with Canada. The 4.5-magnitude earthquake occurred at about 5:02 a.m. and was centered about six miles east of Orcas Island, according to the U.S. Geological Survey.