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Glaciers Spur Alaskan Earthquakes
In a new study, NASA and United States Geological Survey (USGS) scientists found that retreating glaciers in southern Alaska may be opening the way for future earthquakes. The study examined the likelihood of increased earthquake activity in southern Alaska as a result of rapidly melting glaciers. As glaciers melt they lighten the load on the Earth's crust. Tectonic plates, that are mobile pieces of the Earth's crust, can then move more freely, which increases the probability of earthquakes occurring in this region.

Animation of Southern Alaskan Earthquakes over the past decade.    Animation of Southern Alaskan Earthquakes over the past decade.
Duration: 24.0 seconds
Available formats:
  640x480 (30 fps) MPEG-1   13 MB
  720x480 (29.97 fps) MPEG-2   21 MB
  320x240 (30 fps) MPEG-1   3 MB
  320x240     JPEG         10 KB
  320x240     JPEG         11 KB
How to play our movies


Southern Alaskan Earthquakes from 1-18-1993 to 7-19-1993.    Southern Alaskan Earthquakes from 1-18-1993 to 7-19-1993.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 14 KB


Southern Alaskan Earthquakes from 1-18-1993 to 10-6-1993.    Southern Alaskan Earthquakes from 1-18-1993 to 10-6-1993.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 4-7-1994.    Southern Alaskan Earthquakes from 1-18-1993 to 4-7-1994.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 1-14-1995.    Southern Alaskan Earthquakes from 1-18-1993 to 1-14-1995.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 7-25-1995.    Southern Alaskan Earthquakes from 1-18-1993 to 7-25-1995.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 12-5-1995.    Southern Alaskan Earthquakes from 1-18-1993 to 12-5-1995.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 6-18-1996.    Southern Alaskan Earthquakes from 1-18-1993 to 6-18-1996.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 2-6-1997.    Southern Alaskan Earthquakes from 1-18-1993 to 2-6-1997.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 9-2-1997.    Southern Alaskan Earthquakes from 1-18-1993 to 9-2-1997.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 1-25-1998.    Southern Alaskan Earthquakes from 1-18-1993 to 1-25-1998.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 10-19-1998.    Southern Alaskan Earthquakes from 1-18-1993 to 10-19-1998.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 5-4-1999.    Southern Alaskan Earthquakes from 1-18-1993 to 5-4-1999.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 7-13-2000.    Southern Alaskan Earthquakes from 1-18-1993 to 7-13-2000.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 11-16-2001.    Southern Alaskan Earthquakes from 1-18-1993 to 11-16-2001.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 9-16-2002.    Southern Alaskan Earthquakes from 1-18-1993 to 9-16-2002.

Available formats:
  2560 x 1920     TIFF 7 MB
  320 x 240         JPEG 15 KB


Southern Alaskan Earthquakes from 1-18-1993 to 8-2-2003.    Southern Alaskan Earthquakes from 1-18-1993 to 8-2-2003.

Available formats:
  2560 x 1920     TIFF 7 MB
  160 x 80           PNG 30 KB
  320 x 240         JPEG 14 KB
  80 x 40             PNG   7 KB

Animation Number:2969
Animators:Alex Kekesi (Lead)
 Stuart A. Snodgrass
 Marte Newcombe
Studio:SVS
Completed:2004-07-30
Scientists:Jeanne Sauber (NASA/GSFC)
 Bruce Molnia (USGS)
Writer:Sarah Dewitt (NASA/GSFC)
Instruments:Terra/MODIS
 Seismometer
Data set:True Color
Data Collected:Seismic Measurements: 1/18/1993 - 8/2/2003
Series:Glacier Earthquakes
Goddard TV Tape:G2004-042
Keywords:
SVS >> Earthquake
SVS >> Glacier
GCMD >> EARTH SCIENCE >> Solid Earth >> Seismology
GCMD >> Location >> Alaska
More Information on this topic available at:
http://www.gsfc.nasa.gov/topstory/2004/0715glacierquakes.html
Science paper:Journal of Global and Planetary Change (July issue)
 
 
Please give credit for this visualization to
NASA/Goddard Space Flight Center
Scientific Visualization Studio, USGS/National Earthquake Information Center


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