3 earthquakes, which occurred off the coast of Kamchatka Peninsula

Kamchatka Peninsula

The Kamchatka Peninsula is a peninsula in the Russian Far East, with an area of . It lies between the Pacific Ocean to the east and the Sea of Okhotsk to the west...

 in far eastern Russia

Russia

Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

 in 1737, 1923 and 1952, were megathrust earthquake

Megathrust earthquake

Megathrust earthquakes occur at subduction zones at destructive plate boundaries , where one tectonic plate is forced under another. Due to the shallow dip of the plate boundary, which causes large sections to get stuck, these earthquakes are among the world's largest, with moment magnitudes ...

s and caused tsunami

Tsunami

A tsunami is a series of water waves caused by the displacement of a large volume of a body of water, typically an ocean or a large lake...

s. They occurred where the Pacific Plate

Pacific Plate

The Pacific Plate is an oceanic tectonic plate that lies beneath the Pacific Ocean. At 103 million square kilometres, it is the largest tectonic plate....

 subducts under the Okhotsk Plate

Okhotsk Plate

The Okhotsk Plate is a tectonic plate covering the Sea of Okhotsk, the Kamchatka Peninsula, Sakhalin Island and Tōhoku and Hokkaidō in Japan. It was formerly considered a part of the North American Plate, but recent studies indicate that it is an independent plate, bounded on the north by the...

 at the Kuril-Kamchatka Trench

Kuril-Kamchatka Trench

The Kuril–Kamchatka Trench or Kuril Trench is an oceanic trench in the northwest Pacific Ocean. It lies off the southeast coast of Kamchatka and parallels the Kuril Island chain to meet the Japan Trench east of Hokkaido...

. The depth of the trench at the point of the earthquakes is 7,000–7,500 meters. Northern Kamchatka lies at the western end of the Bering fault, between the Pacific Plate and North American Plate

North American Plate

The North American Plate is a tectonic plate covering most of North America, Greenland, Cuba, Bahamas, and parts of Siberia, Japan and Iceland. It extends eastward to the Mid-Atlantic Ridge and westward to the Chersky Range in eastern Siberia. The plate includes both continental and oceanic crust...

, or the Bering plate There are many more earthquakes and tsunamis originating from Kamchatka, of which the most recent was the 1997 Kamchatka earthquake

1997 Kamchatka earthquake

The 1997 Kamchatka earthquake, or 1997 Kronotsky earthquake, occurred on December 5, 1997 at 11:26 UTC near the east coast of the Kamchatka Peninsula. It is an Mw 7.7 earthquake and was felt with intensity MM V in Petropavlovsk-Kamchatskiy. A 60 cm tsunami was recorded in Kahului, 47 cm in Hilo,...

and tsunami originating near the Kronotsky Peninsula.
The epicentre of the 1737 earthquake was located at 52.5°N 159.5°W.