2-magnitude quake recorded off coast of El Salvador

The quake was reported at 12:35 a.m. There have been at least 18 quakes in that area in the last 24 hours. According to the report, they're striking along the Seattle fault, which runs from Sammamish, through Bellevue, the southern edge of Seattle, and on to Bremerton.

The US Pacific Tsunami Center said the quake was not expected to cause a tsunami.

The USGA website reports that a 2.8 magnitude quake occurred at 4:31 a.m. Friday morning near Narrows.

Local seismologists aren't sure whether the swarm of minor earthquakes near Bremerton, and other temblors, may signal the coming of a much larger event.

Concerns shifted from "Did you feel it?" to "What does it mean?"

Even though the magnitude-3.6 quake happened east of Bremerton, people on Facebook said they felt shaking in Ballard, Issaquah and Edmonds. But we don't really understand what causes such swarms, she wrote.

The agency reported a 3.5 magnitude quake in Harper County on May 5.