
Are the following mentions coreferent?:
<m> Lake County earthquake </m> in The Napa Valley was shaken at 2 : 09 a.m. Thursday by a magnitude 4. 6 earthquake located near Clearlake in Lake County, the U. S. Geological Survey reported. The Napa Valley was shaken at 2 : 13 am. Thursday by a magnitude 4. 6 earthquake located near Clearlake in Lake County, the U. S. Geological Survey reported. 
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<m> 4 . 6 - magnitude earthquake </m> in A 4. 6 - magnitude earthquake rattled Northern California overnight Thursday, shaking residents from San Francisco to north of Sacramento. The temblor struck at 2 : 09 a.m. and was centered in Geyserville, about 20 miles north of Santa Rosa, according to the U. S. Geological Survey. USGS measurements indicated at least 20 smaller earthquakes followed throughout the morning. 