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The Okhotsk Plate
Okhotsk Plate
is a minor tectonic plate covering the Sea of Okhotsk, the Kamchatka Peninsula, Sakhalin Island
Sakhalin Island
and Tōhoku
Tōhoku
and Hokkaidō
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 North American Plate.[1] The boundary is a left-lateral moving transform fault, the Ulakhan Fault. On the east, the plate is bounded by the Pacific Plate
Pacific Plate
at the Kuril-Kamchatka Trench
Kuril-Kamchatka Trench
and the Japan
Japan
Trench, on the south by the Philippine Sea Plate
Philippine Sea Plate
at the Nankai Trough, on the west by the Eurasian Plate, and possibly on the southwest by the Amurian Plate.[2] Geology[edit] The boundary between Okhotsk Plate
Okhotsk Plate
and Amurian Plate
Amurian Plate
might be responsible for many strong earthquakes that occurred in the Sea of Japan
Japan
as well as in Sakhalin
Sakhalin
Island, such as the MW7.1 (MS7.5 according to other sources) earthquake of May 27, 1995 in northern Sakhalin.[3][4][5] The earthquake devastated Neftegorsk, and the town was not rebuilt after the earthquake. Other notable intraplate earthquakes, such as the 1983 Sea of Japan
Japan
earthquake and the 1993 Hokkaidō
Hokkaidō
earthquake, have triggered tsunamis in the Sea of Japan. The boundary between Okhotsk Plate
Okhotsk Plate
and Pacific Plate
Pacific Plate
is a subduction zone, where Pacific Plate
Pacific Plate
subducts beneath the Okhotsk Plate. Many strong megathrust earthquakes occurred here, some of them among the largest on world record, including the Kamchatka earthquakes
Kamchatka earthquakes
of 1737 (estimated M9.0~9.3) and 1952 (M9.0). Such strong megathrust earthquakes can also occur near the Kuril Islands, as the M8.3 earthquake of November 15, 2006,[6][7] Hokkaido, as the M8.3 earthquake of September 26, 2003[8][9] and the M9.0 2011 Tōhoku earthquake off the coast of Honshu. GPS measurements and other studies show that the Okhotsk Plate
Okhotsk Plate
is slowly rotating in a clockwise direction. Models indicate that it rotates 0.2 deg/Myr about a pole located north of Sakhalin.[10] References[edit]

^ Apel et al., 2006; and Seno et al., 1996 http://onlinelibrary.wiley.com/wol1/doi/10.1029/2006GL026077/full ^ http://www.stephan-mueller-spec-publ-ser.net/4/147/2009/smsps-4-147-2009.pdf ^ Tamura, Makoto; et al. (2002). "The ShalIow Seismicity in the Southern Part of Sakhalin" (PDF). Geophysical Bulletin of Hokkaido University. 65: 127–142.  ^ "Earthquake Information for 1995". USGS.  ^ Arefiev, S. S.; et al. (2006). "Deep structure and tomographic imaging of strong earthquake source zones". Izvestiya Physics of the solid Earth. 42 (10): 850–863. Bibcode:2006IzPSE..42..850A. doi:10.1134/S1069351306100090.  ^ "IEEE Xplore Abstract – Offshore Tsunami Observation by the Kuril Islands Earthquake of 15 November 2006" (PDF). Ieeexplore.ieee.org. doi:10.1109/UT.2007.370767. Retrieved 2016-01-01.  ^ "Magnitude 8.3 – KURIL ISLANDS". Earthquake.usgs.gov. Retrieved 2016-01-01.  ^ Watanabe, Tomoki; et al. (2006). "Seismological monitoring on the 2003 Tokachi-oki earthquake, derived from off Kushiro permanent cabled OBSs and land-based observations". Tectonophysics. 426 (1–2): 107–118. Bibcode:2006Tectp.426..107W. doi:10.1016/j.tecto.2006.02.016.  ^ "Magnitude 8.3 – HOKKAIDO, JAPAN REGION". Earthquake.usgs.gov. Retrieved 2016-01-01.  ^ Apel, et al., 2006

External links[edit]

Okhotsk Plate
Okhotsk Plate
Modeling Joint US-Russia Workshop on the Plate Tectonic Evolution of Northeast Russia, Dec. 2004

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Tectonic plates

Major

African Indo-Australian Plate Antarctic Eurasian North American Pacific South American

Minor

Amurian Arabian Caribbean Caroline Cocos Juan de Fuca Nazca Okhotsk Philippine Scotia Somali Yangtze

Other

Adriatic Aegean Sea Anatolian Australian Balmoral Reef Banda Sea Bird's Head Burma Capricorn Conway Reef Easter Explorer Futuna Galapagos Gonâve Gorda Greenland Halmahera Iberian Indian Iranian Juan Fernández Kerguelen Kermadec Madagascar Manus Maoke Mariana Molucca Sea New Hebrides Niuafo’ou North Andes North Bismarck North Galapagos Nubian Okinawa Panama Pelso Philippine Mobile Belt Rivera Sangihe Seychelles Shetland Solomon Sea South Bismarck South Sandwich Sunda Timor Tisza Tonga Woodlark

Historical

Baltic Bellingshausen Charcot Cimmeria Farallon Insular Intermontane Izanagi Kula Lhasa Malvinas Moa Phoenix

List of tectonic plates

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Tectonic plates of East Asia
East Asia
(Eurasian Plate- Pacific Plate
Pacific Plate
Convergence Zone)

Large

Amur Plate Okhotsk Plate Philippine Sea Plate Yangtze Plate

Small

Mariana Plate Okinawa Plate Philippine Mobile Belt

Faults and rift zones

Baikal Rift Zone Fukozu Fault Idosawa Fault Itoigawa-Shizuoka Tectonic Line Izu-Bonin-Mariana Arc Japan
Japan
Median Tectonic Line Longmenshan Fault Neodani Fault Nojima Fault Northeastern Japan
Japan
Arc Philippine Fault System Senya Fault Tanna Fault Ulakhan Fault Urasoko fault

Trenches and troughs

Kuril Trench Mariana Trench Japan Izu-Ogasawara Trench Japan
Japan
Trench Nankai Trough Sagami Trough Suruga Trough Okinawa Trough Ryukyu Trench Philippines Manila Trench Philippine Trench East Luzon Trench

Other

Boso Triple Junction

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