GEOG 1 Lecture Notes - Lecture 27: Epicenter, Lithosphere, Himalayas
Document Summary
Counties along the pacific ring of fire which borders the pacific ocean are at a high risk of earthquakes: southwest canada, western us, mexico, japan , taiwan, etc. Himalayan mountains: china, india, pakistan, middle eastern counties are at high risk. Plate-boundary earthquakes which occur on faults separating lithospheric plates are of three types. Strike-slip occur on transform faults where lithospheric plates slide horizontally past one another. Thrust earthquakes on faults separating conversing plates. Cascadia subduction zone off the coasts of bc, washington, and oregon. Subduction earthquakes occur on the large thrust faults that bound subducting and over-riding lithospheric plates. Juan de fuca and north american plates along the west coast of north america. Normal dip-slip earthquakes on faults associated with divergent plate boundaries. Located far from land, typically in oceans no larger than m6. Intraplate earthquakes occur within lithosphere plates rather than at their boundaries, can be large and extremely damaging, occur on strike-slip, reverse, or normal faults.
