Browsing the archives for the collapse tag.

Kilauea Volcano in Hawaii Volcanoes National Park – Crater “Pu u O o” Collapses 250 feet (photo courtesy NPS)

Hawaii, hawaiian islands, National Park, National Parks

Kilauea Volcano is in Hawaii Volcanoes National Park and is the earth’s most active volcano, sending Lava to the sea pretty much continuously since 1983, though the flow of lava and the patterns vary considerably.    Here are my own Kilauea pictures from a 2005 trip out into the lava flows:

The Volcano is in Kilauea Volcanic National Park and is located in the south of the “Big Island” aka Hawaiia, not to be confused with Oahu – the Island with most of the people, the big city of Honolulu, and many scenes from Hawaii 5-0.

Recent Activity from National Park Service NPS at Kilauea National Park: In the east rift zone: Pu`u `O`o crater walls continued to collapse; lava was trickling back onto the collapsed crater floor; lava continued to issue from west flank vents and pond near the vents. At the summit, the lava lake surface continued to recede. Seismicity was low. Gas emissions remained elevated from summit and rift zone vents.    (Photo courtesy Hawaii Volcano Observatory).

Middle east rift zone vents: The walls of Pu`u `O`o Crater continued to collapse yesterday including a block immediately to the left of the webcam which dropped in overnight. A trickle of lava returned to the very deepest part of the collapsed crater floor yesterday morning and was visible in the webcam overnight. During yesterday’s overflight, the depth of the collapse was measured at about 75 m (245 ft) below the east rim. The flows that gushed out of the west flank vents on August 3rd remained active but with the outer limits of activity retreating back toward the sources; in other words, lower effusion rates weren’t allowing the active lava to travel as far from the vents before solidifying. The flows remained entirely within Hawai`i Volcanoes National Park and pose no direct hazard to any developed areas.

The GPS network around Pu`u `O`o Cone recorded slow contraction across the cone overnight. The tiltmeter on the north flank of Pu`u `O`o Cone recorded continued deflation. Seismic tremor levels were low. The most recent (preliminary) sulfur dioxide emission rate measurement was 3,100 tonnes/day on August 4, 2011, from all east rift zone sources.

Background from NPS Kilauea  National Park: The eruption of Kilauea’s middle east rift zone started with a fissure eruption on January 3, 1983, and has continued with few interruptions through Pu`u `O`o Crater or vents within a few kilometers to the east or west. Since late March, lava has been filling the collapsed crater within Pu`u `O`o Cone, first building a perched lava lake that, in July, evolved into a shield with the lake at its top as a result of uplift of the crater floor and lake. In early August, the crater floor again collapsed as lava burst from vents on the west flank of Pu`u `O`o cone.

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