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Shatter Ring on PKK Lava Tube (March 20-22, 2006)
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Title: Shatter Ring on PKK Lava Tube (March 20-22, 2006)


The flow field feature seen here is called a shatter ring. Shatter rings are circular to elliptical volcanic features, typically tens of meters (yards) in diameter, which form over active lava tubes. They are typified by an upraised rim of blocky rubble and a central depression. Dozens of shatter rings have been identified on volcanoes in Hawai'i, and have also been reported from basaltic lava fields in Iceland, Australia, Italy, and the mainland United States. They form when lava pressure in the tube repeatedly exceeds the strength of the overlying rock. Repeated flexing of the lava-tube roof piles up rubble around the edges of the mobile area. The shatter ring shown here, informally called the Campout Shatter Ring because it was first seen while HVO geologists were camping near Pu'u 'O'o conducting a multi-day research study, was about 40 meters (130 feet) across. This video shows a series of four uplift cycles over three days. The uplift is obvious during daylight hours, while at night only the associated breakout is visible.

The images that comprise this video were acquired by a time-lapse camera positioned about 1 kilometer (0.6 miles) east of the shatter ring. The image acquisition rate was 1 frame per 10 minutes, and the resulting video is played at 10 frames per second.

Location: HI, USA

Date Taken: 3/20/2006

Length: 0:00

Video Producer: U.S. Geological Survey

Note: This video has been released into the public domain by the U.S. Geological Survey for use in its entirety. Some videos may contain pieces of copyrighted material. If you wish to use a portion of the video for any purpose, other than for resharing/reposting the video in its entirety, please contact the Video Producer/Videographer listed with this video. Please refer to the USGS Copyright section for how to credit this video.

For more information, visit the HVO Web site at Hawaiian Volcano Observatory.

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Tags: FlowField HVO Hawaii Kilauea PuuOo Volcano


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