This data visualization maps vertical motion as a function of time, so that you can see seismic shocks ripple across the country.
For more information, visit http://www.iris.edu/spud/gmv/109962.
We want to hear what you think about this article. Submit a letter to the editor or write to firstname.lastname@example.org.
Kasia Cieplak-Mayr von Baldegg is the former executive producer and general manager of Atlantic Studios at The Atlantic.