Quiescent Mount Etna

Quiescent Mount Etna
  • Credit:

    NASA Earth Observatory image by Jesse Allen and Robert Simmon, using EO-1 ALI data. Caption by Robert Simmon.

After a brief spurt of activity on April 9th and 10th, 2011, Mounta Etna is relatively quiet again. Except for a thin ribbon of fresh lava, pristine snow covers the summit of the volcano in this natural-color satellite image. In addition to lava and ash (now hidden beneath snow), the eruption generated small pyroclastic flows. These flows were generated by the violent interaction between hot lava and deep snow.

The image was acquired on April 21, 2011 by the Advanced Land Imager (ALI) aboard the Earth Observing-1 (EO-1) satellite.

  1. References

  2. INGV-CT (2011, April 10). Etna Update. Accessed April 25, 2011.
  3. Klemetti, Erik. (2011, April 12). Tuesday Tidbits: Measuring the Yellowstone plume, unease at Taal and pyroclastic flows on Etna. Accessed April 25, 2011.

Images & Animations


File Dimensions

  • 720x480
  • JPEG
  • 3498x3018
  • JPEG 3 MB

Note: Often times, due to the size, browsers have a difficult time opening and displaying images. If you experiece an error when clicking on an image link, please try directly downloading the image (using a right click, save as method) to view it locally.


  • Data Date:

    April 22, 2011
  • Visualization Date:

    April 25, 2011
  • Sensor(s):

    EO-1 - ALI
NASA - National Aeronautics and Space Administration