At Puʻuʻōʻō, fissures reopened on either side of the vent, while at Maunaulu, the eruption stalled and the vent collapsed ...
POPOCATÉPETL VOLCANO, Mexico — In the predawn darkness, a team of scientists climbs the slope of Mexico's Popocatépetl volcano, one of the world's most active and whose eruption could affect millions ...
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