JUST IN: Phivolcs reports an ongoing lava-collapse pyroclastic density current or "uson" at #Mayon Volcano. More details and official updates are expected to follow shortly. | via Ellalyn De Vera-Ruiz

JUST IN: Phivolcs reports an ongoing lava-collapse pyroclastic density current or "uson" at #Mayon Volcano. More details and official updates are expected to follow shortly. | via Ellalyn De Vera-Ruiz

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