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In other words, whatever the significance of the lava dome is, this volume of hot, viscous rock – standing some 600 metres (1,968 feet) tall and spanning a width of 10 kilometres (6.2 miles) – isn't an echo of Akahoya, but something new taking shape under the East China Sea.
"The post-caldera activity, at least [at] this caldera, is regarded as the preparation stage to the next super-eruption," Tatsumi explained to Live Science, "not as the calming-down stage from the previous super-eruption." Just what this activity portends is unclear for now, and at least one researcher has pointed out that we could be looking at a congregation of smaller lava domes, as opposed to one giant combined mass.
M 4.5 - 22km W of Petrolia, CA
Time 2018-03-09 06:01:28 (UTC)
Location 40.292°N 124.542°W Depth 15.1 km