Magnitude 4.2 earthquake shakes Puget Sound region

A magnitude 4.2 earthquake shook the Puget Sound region on Tuesday afternoon, with shaking reported in Seattle, Tacoma, Olympia and other nearby communities. The U.S. Geological Survey reported the quake and revised its magnitude from initial estimates. No damage or injuries had been reported in the immediate aftermath, according to reports citing local officials and seismic agencies. The earthquake struck near the Kitsap-Pierce County line, a few miles northwest of Gig Harbor. The USGS placed its depth at about 16 to 17 miles. The shaking was described as light in many areas, and reports of people feeling it came from across the region. One account said more than 5,000 people had reported feeling the quake during its first hour. Sound Transit temporarily had trains share one track at Angle Lake Station because of seismic activity. The transit agency also directed riders to board trains at the Federal Way Downtown platform. The Pacific Northwest Seismic Network said the ShakeAlert earthquake early-warning system detected the quake but determined it was too small to trigger cellphone alerts.