Pyroclastic flows descend the south eastern flank of Mayon Volcano, Philippines, during its 1984 eruption
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Pyroclastic flows descend the south eastern flank of Mayon Volcano, Philippines, during its 1984 eruption. Credit: USGS
Pyroclastic flows descend the south eastern flank of Mayon Volcano, Philippines, during its 1984 eruption. Credit: USGS