Santiaguito—a volcano in Guatemala—erupts almost every hour. What causes this regular activity? https://t.co/D4jdcPs13e
— National Geographic (@NatGeo) January 30, 2017
via Twitter https://twitter.com/NatGeo
January 30, 2017 at 08:36PM
Santiaguito—a volcano in Guatemala—erupts almost every hour. What causes this regular activity? https://t.co/D4jdcPs13e
— National Geographic (@NatGeo) January 30, 2017
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