An earthquake that struck Plumas County was felt by thousands in Northern California. It had a preliminary magnitude of 5.7, and was followed by more than 40 aftershocks with magnitudes between 2.5 and 4.9. Rafael Abreau, a Geophysicist with the U.S. Geological Survey's National Earthquake Center, says the largest quake struck at 8:47PM Thursday night, and was centered six miles west northwest of Greenville, and 26 miles southwest of Susanville. Plumas County Sheriff Greg Hagwood says the quake sent items tumbling from grocery store shelves and downed chimneys when it hit last night. He said it also damaged a water tank, affecting 300 people. The quake was felt as far away as San Francisco and in two other states. Cal-Trans has been checking for rocks on Highway 89, and their bridge crew has been checking for structural damage. The epicenter is less than 40 miles from Lassen Peak, which last erupted on May 22nd of 1915.