The orientation and motion of these events are represented on so-called “beachball plots.” The intensity and number of clusters of these events follow a logarithmic law partially named for Beno Gutenberg. A “shadow zone” where these events cannot (10[2])be detected is caused by P wave refraction. (10[3])These events result from the release of built-up strain per elastic rebound theory. States like Oklahoma have seen an increased rate of liquefaction caused by these events from fluid injection used in fracking. These events’ strength is measured with the moment magnitude scale. For 10 points, what geologic events occur at faults and have their strength reported with the Richter scale? ■END■