This 2015 image provided by the Woods Hole Oceanographic Institution shows the edge of the 2015 lava flow, above, at the Axial Seamount where it overlies older sedimented lavas, bottom. A study in the Wednesday, Feb. 7, 2018 journal Science Advances figures sometime after the asteroid crash creating the Chicxulub crater in the Yucatan 66 million years ago, unusual and extra strong eruptions happened on the floor of the oceans, probably the Pacific and Indian oceans. (Bill Chadwick/Oregon State University, ROV Jason, Woods Hole Oceanographic Institution via AP)
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