Study: 2014 Napa quake may be linked to groundwater changes
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June 14, 2018
NAPA, Calif. (AP) — Research suggests the magnitude 6.0 earthquake that rocked California wine country in 2014 may have been caused by an expansion of Earth's crust because of seasonally receding groundwater under the Napa and Sonoma valleys.
The vineyard-filled valleys flank the West Napa Fault, which produced the quake that killed one person, injured several hundred and caused more than $500 million in losses.
The study recently published in the American Geophysical Union's Journal of Geophysical Research: Solid Earth suggests land between the valleys is stretched each summer as groundwater...
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