1963 Kuril Islands earthquake
  October 13  October 20 | |
| UTC time | 1963-10-13 05:17:59 |
|---|---|
| ISC event | 873239 |
| USGS-ANSS | ComCat |
| Local date | October 13, 1963 |
| Local time | 15:17:59 |
| Magnitude | 8.5 Mw |
| Depth | 47 km (29.2 mi) |
| Epicenter | 44°49′N 149°32′E / 44.81°N 149.54°E |
| Areas affected | Soviet Union |
| Max. intensity | MMI IX (Violent)[1] |
| Tsunami | Yes |
The 1963 Kuril Islands earthquake occurred at 05:17 UTC, on October 13.[2] The earthquake had a magnitude of 8.5 and was followed by a Mw 7.8 event seven days later.[3] Both earthquakes triggered tsunamis that were observed around the northern part of the Pacific Ocean.
Tectonic setting
[edit]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
[edit]No damage, deaths, or injuries were recorded for these two earthquakes or their associated tsunamis.
Characteristics
[edit]Earthquake
[edit]The megathrust earthquake ruptured a 250 km-long section of the Kuril–Kamchatka Trench and based on pulses of shock registered on seismometer records, it was found that there were three particular areas of asperity with high amount of slip inside the torn subduction interface, each roughly 50 km in length and 7.5Mw in energy. [4]
Tsunami
[edit]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.[1]
See also
[edit]- 1994 Kuril Islands earthquake
- 2006 Kuril Islands earthquake
- 2007 Kuril Islands earthquake
- List of earthquakes in 1963
- List of earthquakes in Japan
- List of earthquakes in Russia
References
[edit]- ^ a b NGDC. "Search results page showing the two events". Retrieved 12 March 2010.
- ^ "M5.3 – Kuril Islands (BETA)" U.S. Geological Survey. Retrieved 2014-9-4.
- ^ "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.; Kanamori H. (1983). "Seismic coupling and uncoupling at subduction zones" (PDF). Tectonophysics. 99 (2–4): 99–117. Bibcode:1983Tectp..99...99R. doi:10.1016/0040-1951(83)90097-5. Archived from the original (PDF) on 2010-07-23. Retrieved 2010-03-12.
External links
[edit]- The International Seismological Centre has a bibliography and/or authoritative data for this event.