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  • Title: Electrical resistivity variations associated with earthquakes on the san andreas fault.
    Author: Mazzella A, Morrison HF.
    Journal: Science; 1974 Sep 06; 185(4154):855-7. PubMed ID: 17833697.
    Abstract:
    A 24 percent precursory change in apparent electrical resistivity was observed before a magnitude 3.9 earthquake of strike-slip nature on the San Andreas fault in central California. The experimental configuration and numerical calculations suggest that the change is associated with a volume at depth rather than some near-surface phenomenon. The character and duration of the precursor period agree well with those of other earthquake studies and support a dilatant earthquake mechanism model.
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