When plate boundaries occur in continental lithosphere, deformation is spread out over a much larger area than the plate boundary, so earthquakes occur away from the plate boundary and are related to strains developed within the broader zone of deformation caused by major irregularities in the fault trace.
One study that focused on risk assessment of mental illness and violence found that the stigma attached to such illnesses prevents those who require help from actually seeking it. The study pointed out that since 1983 there have been 78 mass shootings in the U.S., resulting in 547 deaths. The mental health of the shooters was the mediaâs prime focus in each case. Mental status aside, in the past decade alone, gun-related violence accounted for the deaths of over a quarter of a million people.
Under the Reddit definition, a shooting spree that wounds at least four people, but doesn't kill them, is still a mass shooting. Including Monday's mass shooting, the Reddit list for 2013 is nearing 250 incidents. That's an average of one mass shooting almost every day. With so many mass shootings, even those that fit the frequently used definition rarely prompt a presidential response.