Thursday, May 26, 2011

GOES-13 Satellite Video Shows Grimsvotn Volcanic Ash Shooting into the Atmosphere

A new video released from the NASA/NOAA GOES Project provides a satellite view of spewing ash from Grimsvotn Volcano in Iceland. The volcano had stopped some European air travel earlier this week.

This natural-color satellite image shows a dense plume of ash between Scotland (lower left) and Norway (right). This image was acquired at 11:10 UTC on May 24, 2011, by the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument that flies aboard NASA's Terra satellite.

Credit: NASA, Jeff Schmaltz, MODIS Rapid Response Team and Robert Simmon

The Geostationary Operational Environmental Satellite called GOES-13 covers weather events over the eastern U.S. and the Atlantic Ocean, and can also see what's happening in Iceland. As a result, the GOES-13 satellite observed the ash plume from the eruption of the volcano over the days of May 21 through May 24. The animation of satellite imagery was compiled by Dr. Dennis Chesters of the NASA GOES Project at NASA's Goddard Space Flight Center in Greenbelt, Md. The GOES series of satellites is operated by NOAA, and the NASA GOES Project creates images and animations from the GOES series of satellites.

According to the Daily Mail in the U.K., the eruption was responsible for grounding about 500 European flights on Tuesday, May 24.

The GOES-13 satellite observed the ash plume from the eruption of the Grimsvotn Volcano over the days of May 21 through May 24.
 Credit: NASA/NOAA GOES Project/Dennis Chesters
As of Wednesday, May 25 at 0300 GMT, there was no plume detected from the volcano. According to the Icelandic Meteorological Service, the last plume was detected at 0210 GMT (10:10 p.m. EDT, May 24) and only steam is seeping from the volcano. At 12 p.m. EDT on May 25, the U.K. Met Office Volcanic Ash Advisory from Toulouse described Grimsvotn as "eruption paused."


Grímsvötn, the most active of Iceland’s volcanoes, began erupting around 5:30 p.m. local time on Saturday, May 21, 2011. The volcano, located approximately 140 miles (220 kilometers) east of the capital city of Reykjavik, is situated beneath the Vatnajökull ice cap and last erupted in 2004. According to the Icelandic Meteorological Office, the recent eruption produced a plume that rose to a maximum altitude of approximately 66,000 feet (20 kilometers) on Saturday evening. As of Monday morning (May 23, 2011), plume heights were reported to range between 33,000 to 50,000 feet (10 to 15 kilometers). Iceland’s Kevlavik airport was closed over the weekend, and a windblown cloud of ash has caused the cancellation of several airline flights over Scotland. Britain’s Civil Aviation Authority reports that other parts of the United Kingdom and Ireland might be affected later in the week.

These images from the Multi-angle Imaging SpectroRadiometer (MISR) instrument on NASA’s Terra spacecraft were captured during an overpass of the erupting volcano at 1:00 p.m. local time on Sunday May 22, 2011. The image shows the nadir (vertically-oriented) camera view of the eruption at left, and a stereoscopic height analysis at right, generated by processing data from multiple MISR camera angles. The color scale shows the derived heights. This analysis places the maximum height of the plume at the time of overpass at about 46,000 feet (14 kilometers), which means that the ash has been injected into the stratosphere, the stratified portion of Earth’s upper atmosphere. On this date, atmospheric soundings indicated that the boundary between the lower atmosphere, known as the troposphere, and the stratosphere was at an altitude of about 30,000 feet (9 kilometers).The neighboring wispy cirrus clouds that are visible in the scene occur at roughly this altitude. Near the lower right portion of the image, a diffuse ash cloud is also visible, with heights much closer to the surface.
 Grímsvötn, Volcano Injects Ash into the Stratosphere
Image courtesy NASA/GSFC/LaRC/JPL, MISR Team. Caption derived from JPL Planetary Photojournal Image PIA14161.

For more NASA images of the volcano, visit NASA's Earth Observatory at:
http://earthobservatory.nasa.gov/NaturalHazards/

Contacts and sources:
Rob Gutro
NASA's Goddard Space Flight Center

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