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.
The criteria that was used in the report to determine if the shooting was a Public Mass Shooting includes the following: 1  The shooter killed or injured at least four people. The FBI identifies an individual as a mass murderer if he murders four or more people in a single incident (not including himself). 2  The shootings occurred in a public place.