March 5, 2011 HAWAI‘I ISLAND, Hawaii — At 1:42 p.m. HST this afternoon, USGS Hawaiian Volcano Observatory (HVO) monitoring network detected the onset of rapid deflation at Pu`u `Ō `ō and increased tremor along Kīlauea Volcano’s middle east rift zone. At 2:00 p.m., Kīlauea’s summit also began to deflate.
Between 2:16 and 2:21 p.m., the floor of the Pu`u `Ō `ō crater began to collapse, and within 10 minutes, incandescent ring fractures opened on the crater floor a few tens of meters away from the crater wall. Asthe floor continued to drop, lava appeared in the center of the crater floor, the northeast spatter conewithin Pu`u `Ō `ō collapsed, and an obvious scarp developed on the west side of the crater floor, withlava cascading over the scarp toward the center of the crater.
At 2:41 p.m., the scarp on the west side of the crater floor appeared to disintegrate, expos
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Tags: Puu, Oo, Kilauea, Volcano, Crater, Floor, Collapse
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