File:Fresh Lava Flows Surround Pu'u 'O'o - NASA Earth Observatory.jpg
Fresh_Lava_Flows_Surround_Pu'u_'O'o_-_NASA_Earth_Observatory.jpg (720 × 480 pixels, file size: 112 KB, MIME type: image/jpeg)
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NASA image acquired October 29, 2011 To download the full resolution and other files go to: earthobservatory.nasa.gov/IOTD/view.php?id=76275&src=... Since it began in 1983, the eruption of Kilauea Volcano has usually been centered at Pu’u ’O’o. Gray and brown lava flows radiate from the crater, with the varying shades due to differences in weathering, composition, and the lava’s initial temperature. Photographs of Pu’u ’O’o from the U.S. Geological Survey reveal the remarkable variety of colors and textures in the lava. The overlapping flows form a record of the evolving eruption. The extent of change since early September 2011 is remarkable. This natural-color satellite image, acquired by the Advanced Land Imager (ALI) on Earth Observing-1 (EO-1) shows the recent lava flows as of October 29, 2011. A fissure opened in the flank of Pu’u ’O’o on September 21, draining a lava pond and spawning an ’a’a flow—thick lava that moves relatively slowly and hardens into rough blocks. Over the next few days, the narrow ’a’a flow traveled 3,400 meters (11,000 feet) from the vent. The difference between pahoehoe lava and ’a’a lava is primarily temperature (although gas content, the degree of crystallization, and even slope has an effect). Very hot basalt-rich lava flows easily, while cooler lava with the same composition is more viscous. The current flows on Kilauea move through a lava tube until they emerge at the surface about 1,700 meters (5,600 feet) from the vent. The tube keeps the lava hot enough to remain fluid, resulting in pahoehoe flows. The path of the lava is revealed by a series of faint volcanic plumes (visible in the natural-color image) that extend eastward from Pu’u ’O’o. View more from this event at earthobservatory.nasa.gov/NaturalHazards/event.php?id=360... The Earth Observatory’s mission is to share with the public the images, stories, and discoveries about climate and the environment that emerge from NASA research, including its satellite missions, in-the-field research, and climate models. Like us on Facebook Follow us on Twitter Add us to your circles on Google+ |
| Date | |
| Source | Fresh Lava Flows Surround Pu'u 'O'o |
| Author | NASA's Earth Observatory |
| Camera location |  | View this and other nearby images on: OpenStreetMap |  |
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This image was originally posted to Flickr by NASA Earth Observatory at https://www.flickr.com/photos/68824346@N02/6343203844. It was reviewed on 2 July 2012 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 17:19, 2 July 2012 | | 720 × 480 (112 KB) | Dzlinker (talk | contribs) | == {{int:filedesc}} == {{Information |Description=NASA image acquired October 29, 2011 To download the full resolution and other files go to: [http://earthobservatory.nasa.gov/IOTD/view.php?id=76275&src=flickr earthobservatory.nasa.gov/IOTD/view.php?i... |
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