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Seismologists discovered a cluster of earthquakes (ranging in magnitude between 3.0 and 4.8) that began on July 17, 2012 and ended on July 18, 2012
Originally posted by muzzy...if subduction theory is right then this and the 3 eruptions are probably part of the same thing. Map of that on here goo.gl...
Makes you wonder how many earthquakes are going on further up the EC Ridge thatw e never hear about.
Back in 2012, the raft – composed of pumice rock – covered some 400 square kilometres (154 square miles) of the south-west Pacific Ocean, but months later satellites recorded it dispersing over an area twice the size of New Zealand itself.
Under the surface, the sheer scale of the rocky aftermath took scientists aback when they inspected the site in 2015, at depths as low as 1,220 metres (4,000 feet).
The caldera, which spans nearly 4.5 kilometres (about 3 miles), discharged lava from some 14 vents in a "massive rupture of the volcanic edifice", producing not just pumice rock, but ash, lava domes, and seafloor lava flows.
It may have been (thankfully) buried under an ocean of water, but for a sense of scale, think roughly 1.5 times larger than the 1980 eruption of Mount St. Helens – or 10 times the size of the 2010 Eyjafjallajökull eruption in Iceland.
The researchers say that of the material erupted, three-quarters or more floated to the surface and drifted away – tonnes of it washing up onto shorelines an ocean away.
originally posted by: bigfatfurrytexan
There have been stories of islands forming and then disappearing over the years. I wonder how many could have been from this?