most of the world's earthquakes are located in the ring of fire.
most of the world's earthquakes are located in the ring of fire.
where are most of the world's earthquakes located?
the ring of fire
the majority of tectonic earthquakes originate at the ring of fire in depths not exceeding tens of kilometers. earthquakes occurring at a depth of less than are classified as 'shallow-focus' earthquakes, while those with a focal-depth between are commonly termed 'mid-focus' or 'intermediate-depth' earthquakes. in subduction zones, where older and colder oceanic crust descends beneath another tectonic plate, deep-focus earthquakes may occur at much greater depths (ranging from ). these seismically active areas of subduction are known as wadati–benioff zones. deep-focus earthquakes occur at a depth where the subducted lithosphere should no longer be brittle, due to the high temperature and pressure. a possible mechanism for the generation of deep-focus earthquakes is faulting caused by olivine undergoing a phase transition into a spinel structure.
earthquake
barbara fiske calhoun









































barbara fiske calhoun (born isabelle daniel hall; september 9, 1919 – april 28, 2014) was an american cartoonist and painter, one of the few female creators from the golden age of comic books. she co-founded quarry hill creative center, one of vermont's oldest alternative communities, on the fiske family property, in rochester, vermont.









































section::::early life and education.
barbara fiske calhoun