By Jack Brummet, Rim of Fire Ed.
On Thursday, April 23, the new sensors placed on and near the volcano (see photo below) recorded 8,000 small earthquakes in a 24-hour period. The volcano’s caldera, which had been expanding rapidly with magma, collapsed like a deflated balloon.
Scientists are debating whether this was actually an eruption, with actual molten rock flowing over the seafloor. No instruments were destroyed and there was no temperature spike. It is possible the volcano didn't erupt, but filled subterranean fissures, with lava.