
Are the following mentions coreferent?:
<m> shaken </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 temblor rattled homes in Napa, but would not have been expected to do any local damage. 
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<m> Shakes Up </m> in Shakes Up - North Bay March 14, 2013 5 : 22 AM An earthquake with a preliminary magnitude of 4. 6 was recorded in the North Bay Thursday morning, according to the U. S. Geological Survey. 