Published on the Princeton University Facebook
account this morning was Prof. Jeroen Tromp's
statement on yesterday's Virginia earthquake. Appearing along side the statement was a Global ShakeMovie
documenting the earthquake and an array of comments coming in from all facets of Facebook life.
The summary from Prof. Tromp reads:
“Princeton seismologist and Professor of Geosciences Jeroen Tromp explained that earthquakes of this magnitude are unusual on the U.S. East Coast because, unlike the West Coast, the region is not a border between tectonic plates. Earthquakes in the eastern United States instead occur in a single plate's interior. However, the fact that the Virginia earthquake was felt over a large area is normal for the East Coast, where the ground absorbs very little of the vibration. Given the population density of the East Coast, Tromp said, these shallow earthquakes ¾ even a 5.9 magnitude earthquake, which is considered "moderate"¾ can be intense and dangerous.”