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Miles Wilson

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A sign is submerged in the water from Coyote Creek Tuesday, Feb. 21, 2017, in Morgan Hill, Calif. Rains have saturated once-drought stricken California but have created chaos for residents hit hard by the storms. The latest downpours swelled waterways to flood levels and left about half the state under flood, wind and snow advisories. () (AP Photo/Marcio Jose Sanchez)

California’s rain may shed light on new questions about what causes earthquakes

Gillian Foulger, Jon Gluyas, Miles Wilson
Earthquake survivor Fakriyah tries to balance herself as she walks on the rubble at her shop damaged during Wednesday's earthquake in Tringgading, Aceh province, Indonesia, Friday, Dec. 9, 2016. Over a hundred people were killed in the quake that hit the northeast of the province on Sumatra before dawn Wednesday. Hundreds of people were injured and thousands buildings destroyed or heavily damaged. (AP Photo/Binsar Bakkara) (AP)

When the walls were shaking: earthquakes triggered by human activity, say scientists

Gillian Foulger, Jon Gluyas, Miles Wilson