Follow this link to skip to the main content
NASA Jet Propulsion Laboratory California Institute of Technology
JPL - Home Page JPL - Earth JPL - Solar System JPL - Stars and Galaxies JPL - Science and Technology
Bring the Universe to You: JPL Email News JPL RSS Feed JPL Podcast JPL Video
MISR - Multi-angle Imaging SpectroRadiometer
  Gallery  
 Home
 Mission
 Get Data
 Gallery
Latest MISR Imagery
A Collection of MISR Imagery
Suggest an Image
MISR Instrument
AirMISR Instrument
AIrMISR Flight Imagery
 News and Events
 Publications
 FAQs
 Ask a Question
 About Us
 Other Resources
 Internal
A Collection of MISR Imagery
Eruption of Mt. Etna
Larger images available View high-res tiff

Eruption of Mt. Etna
07/25/2001

These Multi-angle Imaging SpectroRadiometer (MISR) images from Terraorbit 8476 capture the July 22, 2001 explosion of the Mt. Etna volcano. Etna is located near the eastern coast of Sicily, to the southwest of mainland Italy. Major eruptions have been issuing from both summit and flank vents. Fine ash falling onto the Province of Catania closed the local airport, and a state of emergency was declared for the town of Nicolosi, which was threatened by lava flows from the southern flanks of the volcano.

At the bottom of this image set are true-color views from MISR's 70-degree forward-viewing camera, the vertical-viewing (nadir) camera, and the 70-degree backward-viewing camera. Each covers an area of 143 kilometers x 88 kilometers. The upper image is a stereo anaglyph created from the instrument's 70-degree and 46-degree forward views, and covers an area of 438 kilometers x 300 kilometers. To facilitate stereo viewing, the images are oriented with north at the left. Viewing the stereo image in 3-D requires red/blue glasses with the red filter placed over your left eye. Information on ordering 3-D glasses is available at http://photojournal.jpl.nasa.gov/Help/VendorList.html.

Two plumes of differing compositions are seen to be emanating from Etna. The bright, brownish plume drifting southeast over the Ionian Sea is composed primarily of tiny frozen fragments of lava, known as ash. A fainter, bluish-white plume is also visible, especially near the summit, and is most apparent in the 70-degree forward view. It contains very fine droplets of dilute sulfuric acid. In addition to the particulate plumes visible in these images, the volcano also expels gases such as water vapor, sulfur dioxide, and carbon dioxide.

Although the Etna volcano is one of the world's most studied volcanoes, it is difficult to classify, being a mixture of overlapping shield and strato volcanoes, partially destroyed by repeated caldera collapse, and partially buried by younger volcanic structures. Eruptions are related to a complex tectonic situation, including subducting plates, numerous major faults intersecting at the volcano, and perhaps also to hot-spot volcanism. For more information on Etna, refer to Michigan Technological University's Department of Geological Engineering and Sciences (http://www.geo.mtu.edu/~boris/ETNA.html) and to the Smithsonian Institution's Global Volcanism Program (http://www.volcano.si.edu/gvp/usgs/).

Mt. Etna is Europe's highest (3315 meters) and most active volcano. In ancient Greek mythology, Etna was identified with the forge of Volcan.

Credit: Image credit: NASA/GSFC/LaRC/JPL, MISR Team.

<< RETURN TO GALLERY