This blog provides commentary on interesting geological events occurring around the world in the context of my own work. This work is, broadly, geological fluid dynamics. The events that I highlight here are those that resonate with my professional life and ideas, and my goal is to interpret them in the context of ideas I've developed in my research. The blog does not represent any particular research agenda. It is written on a personal basis and does not seek to represent the University of Illinois, where I am a professor of geology and physics. Enjoy Geology in Motion! I would be glad to be alerted to geologic events of interest to post here! I hope that this blog can provide current event materials that will make geology come alive.

Banner image is by Ludie Cochrane..

Susan Kieffer can be contacted at s1kieffer at gmail.com

Monday, February 4, 2019

Great shock wave sequence in Space X Raptor Enginer Test Fire

In the first few seconds of this Space X engine test fire, there is a brief, but great, sequence of shock waves in the exhaust plume. https://www.cnn.com/videos/business/2019/02/04/spacex-raptor-engine-test-fire.cnn-business/video/playlists/business-news/. The sequence repeats about 2/3 of the way through. This is a well known phenomenon with structures as explained in the graphic.

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