MP4 file: ShakeAlert—Earthquake Early Warning. How does it work?

MP4 file: ShakeAlert—Earthquake Early Warning. How does it work?

File 78962 is a 26MB MP4 Video
Uploaded: Oct7 15
Last Modified: 2016-11-18 01:11:59
https://serc.carleton.edu/download/files/78962/mp4_file_shakealert_earthquake.mp4

The file is referred to in 1 page
Provenance
IRIS (Integrated Research Institutes for Seismology)
http://www.iris.edu/hq/inclass/animation/shakealert_earthquake_early_warning_...
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