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.
When you look at a list of mass shootings in the last 30 years, in which a single gunman killed at least four people, this year does have the highest number of incidents with six mass shooting incidents excluding today's tragedy, according to a list compiled this year by Mother Jones.nd the last few years have also had slightly higher incidents than those in the past three decades. Six of the 12 deadliest shootings have taken place since 2007, and Newton will rank second on that list, according to a report done by The Washington Post.