Há 69 anos ocorreu um dos mais fortes sismos do século XX

  

The main earthquake struck at 16:58 GMT (04:58 local time) on November 4, 1952. Initially assigned a magnitude of 8.2, the quake was revised to 9.0 M_w in later years. A large tsunami resulted, causing destruction and loss of life around the Kamchatka peninsula and the Kuril Islands. Hawaii was also struck, with estimated damages of up to US$1 million and livestock losses, but no human casualties were recorded. Japan reported no casualties or damage. The tsunami reached as far as Alaska, Chile, and New Zealand.

The hypocentre was located at 52.75°N 159.5°E, at a depth of 30 km. The length of the subduction zone fracture was 600 km. Aftershocks were recorded in an area of approximately 247,000 km², at depths of between 40 and 60 km. A recent analysis of the tsunami runup distribution based on historical and geological records give some indication as to the slip distribution of the rupture.

 

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View of the Severo-Kurilsk port. In 1952 a whole settlement was located there. The modern town was rebuilt in another place.

1952 Severo-Kurilsk Tsunami was a major tsunami that hit Severo-Kurilsk, Kuril Islands, Sakhalin Oblast, Russian SFSR, USSR, which occurred on 5 November 1952 at about 5 a.m. It led to the destruction of many settlements in Sakhalin Oblast and Kamchatka Oblast, while the main impact struck the town of Severo-Kurilsk. The tsunami was generated by a major earthquake in the Pacific Ocean, 130 km from the shore of Kamchatka, with an estimated magnitude of 9.0. There were three waves about 15-18 m high. After the earthquake the majority of the Severo-Kurilsk citizens fled to the surrounding hills, where they escaped the first wave. However, most of them returned to the town and were killed by the second wave. The third wave was minor. According to the authorities, out of a population of 6,000 people, 2,336 died.
The remaining survivors were evacuated to continental Russia. The settlement was then rebuilt in another location.

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NOTA: embora provocando poucos mortos, dada a sua magnitude, este sismo é considerado o 9º com mais elevada magnitude, segundo a Wikipédia:

 

 

Rank	Date	Location	Event	Magnitude
1	May 22, 1960	Valdivia, Chile	1960 Valdivia earthquake	9.4–9.6
2	June 11, 1585	Pacific Ocean, Aleutian Islands (now Alaska, United States)	1585 Aleutian Islands earthquake	9.25 (est.)
3	March 27, 1964	Prince William Sound, Alaska, United States	1964 Alaska earthquake	9.2
4	July 8, 1730	Valparaiso, Chile (then part of the Spanish Empire)	1730 Valparaíso earthquake	9.1–9.3 (est.)
5	December 26, 2004	Indian Ocean, Sumatra, Indonesia	2004 Indian Ocean earthquake	9.1–9.3
6	October 17, 1737	Kamchatka, Russia	1737 Kamchatka earthquake	9.0–9.3 (est.)
7	March 11, 2011	Pacific Ocean, Tōhoku region, Japan	2011 Tōhoku earthquake	9.1
8	May 17, 1841	Kamchatka, Russian SFSR, Soviet Union	1841 Kamchatka earthquake	9.0 (est.)
9	November 4, 1952	Kamchatka, Russian SFSR, Soviet Union	1952 Severo-Kurilsk earthquake	9.0
10	October 28, 1707	Pacific Ocean, Shikoku region, Japan	1707 Hōei earthquake	8.7–9.3 (est.)