Earthquakes caused by plate tectonics are called tectonic quakes. They account for most earthquakes worldwide and usually occur at the boundaries of tectonic plates.
Plate tectonics
Induced Earthquakes
Induced quakes are caused by human activity, like tunnel construction, filling reservoirs and implementing geothermal or fracking projects.
Volcanic Earthquakes
Volcanic quakes are associated with active volcanism. They are generally not as powerful as tectonic quakes and often occur relatively near the surface. Consequently, they are usually only felt in the vicinity of the hypocentre.
Collapse Earthquakes
Collapse quakes can be triggered by such phenomena as cave-ins, mostly in karst areas or close to mining facilities, as a result of subsidence.
The up-welling is the rising of the water at the equator at 200 miles at the surface and occurs at the Atlantic and the pacific ocean where the trade winds reach into the northern hemisphere and ships tends to float in left due to the direction of the winds and occurs due to the Coriolis force of the earth.
