I slept through this morning's Midwest quake, but I sure felt this aftershock an hour ago:
That's a seismograph in West Lafayette, IN. The online image gets updated every 10 minutes. If you click the ugly icon up at the top of this post (or click here), you'll see it at its proper size, or follow the link to the real thing.
It appears the seismograph flatlined shortly into the first quake, but stayed online while the second one decayed away.
Edited by gcollins at 04/18/2008 10:04 AM
Edited by gcollins at 04/18/2008 10:11 AM
The views expressed are those of the author(s) and are not necessarily those of Scientific American.