See http://www.thetech.org/exhibits/online/quakes/grams/ for an example seismogram.
Note: this is a placeholder article, someone should upload a free seismogram image.
... -72.341894)1. According to the United States Census Bureau, the town has a total area of 5.8 km² (2.2 mi²). 5.4 km² (2.1 mi²) of it is land and 0.3 ...