SEATTLE (AP) - The University of Washington seismology lab coordinator says a 3.7 earthquake that shook awake some Whidbey Island residents is a reminder that a much bigger quake from the same zone is likely in the future.

Bill Steele told KCPQ-TV the quake was located in the Juan de Fuca tectonic plate, which is slipping under the North America plate.

An Island County sheriff's dispatcher says there was no damage reported from the quake at 5:09 a.m. today.

The UW seismology lab reported it was centered about two miles southeast of Coupeville at a depth of 36 miles. Steele says the depth distributed the force, so it felt weak.