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Location: Pacific Ocean, Nankai Trough, Japan
Magnitude: 8.6 (est.)
Cause: Movement on convergent plate boundary -
Location: Arica, Chile
Magnitude: 8.8 (est.)
Cause: Plates Moving -
Location: Pacific Ocean, USA and Canada
Magnitude: 8.7–9.2 (est.)
Cause: subduction zone -
Location: Valparaiso, Chile
Magnitude: 8.7 (est.)
Cause: convergent plate boundary -
Location: Atlantic Ocean, Lisbon, Portugal
Magnitude: 8.7 (est.
Cause: active tectonic behavio -
Location: Sumatra, Indonesia
Magnitude: 8.8–9.2 (est.)
Cause: convergent plate boundary -
Location: Iquique, Chile (then Peru)
Magnitude: 8.5-9.0 (est.)
Causes: convergent boundary -
Location: Ecuador – Colombia
Magnitude: 8.8
Causes: subduction of the Nazca plate beneath the South American plate -
Location: Kamchatka, Russia (USSR)
Magnitude: 8.5
Causes: Pacific Plate subducts under the Okhotsk Plate at the Kuril-Kamchatka Trench -
Location: Aleutian Islands, Alaska, USA
Magnitude: 8.6
Causes: convergent boundary -
Location: Kamchatka, Russia (then USSR)
Magnitude: 9.0
Cause: Pacific Plate subducts under the Okhotsk Plate at the Kuril-Kamchatka Trench -
Location: Valdivia, Chile
Magnitude: 9.5
Cause: series of strong earthquakes, release of mechanical stress -
Location: Kuril Islands, Russia (USSR)
Magnitude: 8.5
Cause: subduction zone, convergent boundary -
Location: Prince William Sound, Alaska, USA
Magnitude: 9.2
Cause: oceanic plate sinking under a continental plate -
Location: Rat Islands, Alaska, USA
Magnitude: 8.7
Cause: subduction of the Pacific Plate beneath the North American Plate -
Location: Indian Ocean, Sumatra, Indonesia
Magnitude: 9.1–9.3
Cause: fault surface slipped (or ruptured) about 15 metres (50 ft) along the subduction zone -
Location: Sumatra, Indonesia
Magnitude: 8.6
Cause: thrust faulting on the boundary between the Australian Plate and the Sunda Plate -
Location: Sumatra, Indonesia
Magnitude: 8.5
Cause: thrust faulting on the boundary between the Australian Plate and the Sunda Plate -
Location: Maule, Chile
Magnitude: 8.8
Cause: thrust-faulting focal mechanism, caused by the subduction of the Nazca plate beneath the South American Tectonic Plates -
Location: Pacific Ocean, Tōhoku region, Japan
Magnitude: 9.0
Cause: Pacific Plate subducted under the plate beneath northern Honshu
