Muldrow Glacier (McKinley Glacier) is a large glacier in Denali National Park and Preserve in Alaska, USA. It is now moving 100 times faster than normal, which means that it is undergoing a « surge ».

The abrupt acceleration of the glacier movement is clearly visible in the recent series of Sentinel-1 SAR backscatter images (animation below). Also visible is a strong increase in the backscatter due to the formation of new crevasses. These crevasses create new reflectors on which the radar waves can bounce and return to the satellite antenna.


update 18 Oct 2021

Read more about the Muldrow Glacier surge and the ongoing effort to study it :

3 thoughts on “Muldrow Glacier surge in Alaska

  1. It would have been nice to show where Denali (formerly known as Mount McKinley) is in relation to the Muldrow Glacier.

  2. How did you select the same orbital parameters for all pictures assembled in the movie? On Sentinel Hub EO I can select the timelapse option between two dates but the movie keeps on jumping from one projection to another depending on the pass direction and illumination parameters. I cannot find the option for selecting time and only keeping one single illumination condition. Excellent movie. Thanks.

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