Snow and rain tug on earthquake faults in California
Seasonal changes in water weight can set off small tremors
![Sierra Nevada mountains](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/07/061617_MT_CA-quake_main_FREE.jpg?fit=860%2C460&ssl=1)
ON THE REBOUND Weighed down with water during wet winters, California’s northern mountain ranges — like the Sierra Nevada, shown — rebound during dry summers. This seasonal flexing leads to an uptick in small quakes along some faults, new research finds.
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