Arizona earthquakes, 1852-2011, a video time lineby Jonathan DuHamel on Feb. 13, 2012, under Geology
The Arizona Geological Survey has produced a short video showing the time and place of earthquakes in Arizona from 1852-2011. According to the survey, “The older quakes are culled from historical records, and thus are limited to only those large enough to be felt or caused damage. In the past few decades, locations are from seismometers in the region.” An artifact of the data makes it appear that there are more recent earthquakes.
It is very interesting to see where the earthquake hotspots are. Can you guess before seeing the video? (Note, it starts a bit slowly.) A running calendar appears in the lower right side of the video.
This information and video are taken from “Arizona Geology” the blog of Arizona State Geologist Lee Allison. See original post here.