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1963 Kuril Islands earthquake

Earthquake east of the Kuril Islands, Soviet Union

Field	Value
title	1963 Kuril Islands earthquake
timestamp	1963-10-13 05:17:59
isc-event	873239
anss-url	iscgem873239
local-date
local-time	15:17:59
map2	{{Location map many	Russia Sakhalin Oblast
label	October 13
lat	44.81
long	149.54
mark	Bullseye1.png
marksize	30
position	left
label2	October 20
lat2	44.78
long2	150.24
mark2	Bullseye1.png
mark2size	20
position2	right
width	250
float	right
relief	yes}}
magnitude	8.5
depth	47 km (29.2 mi)
location
countries affected	Soviet Union
intensity
tsunami	Yes
duration	93 seconds

| isc-event = 873239 | anss-url = iscgem873239 | local-date = | local-time = 15:17:59 The 1963 Kuril Islands earthquake occurred at 05:17 UTC, on October 13. The earthquake had a moment magnitude () of 8.5 and was followed by an 7.8 event seven days later. Both earthquakes triggered tsunamis that were observed around the northern part of the Pacific Ocean.

Tectonic setting

The Kuril Islands form part of the island arc formed above the subduction zone, where the Pacific plate is being subducted beneath the North American plate. This convergent boundary has been the site of many large megathrust earthquakes, including the second largest earthquake ever recorded.

Damage

No damage, deaths, or injuries were recorded for these two earthquakes or their associated tsunamis.

Characteristics

Earthquake

The megathrust earthquake ruptured a 250 km-long section of the Kuril–Kamchatka Trench which based on pulses of shock registered on seismometer records, found to have contained three particular areas of asperity with high amounts of slip inside the torn subduction interface, each roughly 50 km in length and Mw 7.5 in energy.

Tsunami

The tsunami triggered by the earthquake of October 13, caused a 4.5 m wave locally. The tsunami was also observed in Canada, Japan, Mexico, Hawaii, Alaska, California, and on many islands across the northern Pacific Ocean. The tsunami associated with the October 20 event was larger in the nearby area, with a maximum recorded run-up of 15 m at Urup, but was only observed in the western part of the northern Pacific.

References

[https://earthquake.usgs.gov/earthquakes/eventpage/usb000l41k#summary "M5.3 – Kuril Islands (BETA)"] U.S. Geological Survey. Retrieved 2014-9-4.
[http://adsabs.harvard.edu/abs/1987JGR....9214123B "Rupture process of the Great 1963 Kurile Islands Earthquake Sequence: Asperity interaction and multiple event rupture"] ''SAO/NASA Astrophysics Data System''. Retrieved 2014-9-5.
Ruff, L.. (1983). "Seismic coupling and uncoupling at subduction zones". Tectonophysics.
NGDC. "Search results page showing the two events".

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

1963-earthquakes 1963-in-the-soviet-union 1960s-tsunamis october-1963-in-asia megathrust-earthquakes-in-the-soviet-union earthquakes-of-the-shōwa-era megathrust-earthquakes-in-japan tsunamis-in-russia tsunami-earthquakes earthquakes-in-the-russian-far-east

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