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The explosion of the Hunga Tonga-Hunga Ha'apai volcano is considered the greatest eruption on the planet in the last 30 years, according to reports. Geoscientists employing satellite data to monitor changes in the Earth's surface temperature were less surprised by the Tonga volcanic eruption than the rest of the world.
Share The extrusion of fresh ocean crust at midocean ridges began to slacken 15 million years ago, perhaps cooling the planet. geogphotos/Alamy Stock Photo Slowdown in plate tectonics may have led to Earth’s ice sheets Dec. 22, 2020 , 11:05 AM In seafloor trenches around the world, slabs of old ocean crust fall in slow motion into the mantle, while fresh slabs are built at midocean ridges, where magma emerges at the seams between separating tectonic plates. The engine is relentless—but maybe not so steady: Beginning about 15 million years ago, in the late Miocene epoch, ocean cru...