
Are the following mentions coreferent?:
<m> earthquake </m> in A 4.2 magnitude earthquake shook a remote area of eastern Sonoma County on Sunday morning, the largest in a flurry over the weekend, according to the U.S. Geological Survey. The size of Sunday morning's earthquake caught the attention of people in Cobb, a small community along Highway 175 in Lake County, 4 miles east of The Geysers. 
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<m> magnitude 4 . 6 earthquake </m> in Lake County's Cobb Mountain community was shaken awake early Thursday morning by a magnitude 4. 6 earthquake that startled even folks accustomed to seismic activity because of its size. While shakers around magnitude 2 and 3 are common to the area, Thursday's 2 : 09 a.m. jolt lasted longer and proved stronger than usual. The U.S. Geological Survey reported that the quake was centered about 3 miles southwest of Cobb, in a seismically active area near The Geysers geothermal steamfields. 