Volcano Watch: Kilauea activity update for the week of September 29, 2011

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Pu‘u ‘O‘o Crater time-lapse movie. HD version

(Actiiity updates are written by scientists at the U.S. Geological Survey’s Hawaiian Volcano Observatory.)

A lava lake has been present within the Halemaumau Overlook vent over the past week, resulting in night-time glow visible from the Jaggar Museum. The lake, which is deep within the vent cavity and visible by Webcam, fluctuated in level several times over the past week in response to several deflation-inflation cycles at the summit.

Last week, new fissures opened on the upper east flank of Pu‘u ‘O‘o cone, sending a vigorous flow outside the crater to the southeast and causing the lava level in the crater to drop. The flow front advanced 3.8 km (2.4 miles) to the southeast in the first two days, but the front had stalled by Friday, September 23. Lava has continued to erupt from this eastern fissure over the past week, but flows have stayed closer to the vent, with flows reaching 1.6 km (1 mile) east of Pu‘u ‘O‘o as of Thursday, September 29. In addition, lava continued to pond within the eastern portion of Pu‘u ‘O‘o crater.

No earthquakes beneath Hawai`i Island were reported felt this past week.
Visit the HVO Web site (http://hvo.wr.usgs.gov) for detailed Kilauea and Mauna Loa activity updates, recent volcano photos, recent earthquakes, and more; call (808) 967-8862 for a Kilauea summary; email questions to askHVO@usgs.gov.

Volcano Watch is a weekly article and activity update written by scientists at the U.S. Geological Survey’s Hawaiian Volcano Observatory.

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Lava heads towards the Pu‘u ‘O‘o East webcam

Pu‘u ‘O‘o Crater and West webcam locations
Pu‘u ‘O‘o East webcam location

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