Measuring the Velocity of Coronal Mass Ejections

This multimedia activity uses videos and still images of our Sun to estimate the velocity of a coronal mass ejection, and estimate the time it will take to reach Earth. Resources for this activity include downloadable instructions, including image sets, and a video lecture from Dr. Ramon Lopez at the University of Texas, Arlington.

This resource includes a Digi Kit, which is a web-based interactive lab that blends physics, geometry, and astronomy as students build and use a physical model to explore how CME events impact Earth. Access the CME Science Digi Kit at https://www.compadre.org/books/?ID=64