Nankai Trough

E77321

oceanic trench plate boundary subduction zone submarine trench

The Nankai Trough is a major submarine trench off the coast of southwestern Japan, known as a highly active subduction zone capable of generating powerful megathrust earthquakes and tsunamis.

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All labels observed (3)

Label	Occurrences
Nankai Trough canonical	11
Nankai Trough region	2
Tonankai segment of the Nankai Trough	1

Statements (50)

Predicate	Object
instanceOf	oceanic trench ⓘ plate boundary ⓘ subduction zone ⓘ submarine trench ⓘ
approximateLength	about 700 km ⓘ
associatedEarthquake	1707 Hoei earthquake ⓘ 1854 Ansei-Nankai earthquake ⓘ 1854 Ansei-Tokai earthquake ⓘ
country	Japan ⓘ
earthquakeRecurrenceInterval	approximately 100–200 years ⓘ
extendsFrom	Suruga Bay ⓘ
extendsTo	offshore Kyushu ⓘ
hasObservationNetwork	GPS observation network on land ⓘ cabled seafloor observatories ⓘ ocean-bottom seismometers ⓘ
hazardType	coastal inundation ⓘ land subsidence ⓘ strong ground shaking ⓘ tsunami ⓘ
knownFor	great interplate earthquakes ⓘ megathrust earthquakes ⓘ tsunami generation ⓘ
lastMajorEarthquakeSequence	1944 Tonankai earthquake ⓘ 1946 Nankai earthquake ⓘ
locatedIn	Pacific Ocean ⓘ
locatedOffCoastOf	Honshu ⓘ Kyushu ⓘ Shikoku ⓘ southwestern Japan ⓘ
maximumDepth	over 4000 m ⓘ
maximumExpectedMagnitude	around magnitude 8 to 9 ⓘ
monitoredBy	Japan Agency for Marine-Earth Science and Technology ⓘ Japan Meteorological Agency ⓘ Government of Japan ⓘ surface form: Japanese government
overridingPlate	Amur Plate ⓘ Eurasian Plate ⓘ Okhotsk Plate ⓘ
parallelTo	Japanese island arc ⓘ
partOf	Pacific Ring of Fire ⓘ
riskTo	Kansai region ⓘ Kyushu coastal areas ⓘ Shikoku coastal areas ⓘ Chūbu region ⓘ surface form: Tokai region
segment	Hyuga-nada segment ⓘ Nankai segment ⓘ Tokai segment ⓘ Tonankai segment ⓘ
seismicHazardLevel	very high ⓘ
subductingPlate	Philippine Sea Plate ⓘ
tectonicSetting	convergent plate boundary ⓘ

Referenced by (14)

Full triples — surface form annotated when it differs from this entity's canonical label.

Philippine Sea Plate → hasTrench → Nankai Trough ⓘ

RV Kairei → operatesIn → Nankai Trough ⓘ

this entity surface form: Nankai Trough region

Shikoku Basin → boundedBy → Nankai Trough ⓘ

Shikoku Basin → adjacentTo → Nankai Trough ⓘ

Chikyu scientific drilling vessel → locationOfOperations → Nankai Trough ⓘ

subject surface form: Chikyu

1946 Nankai earthquake → location → Nankai Trough ⓘ

1854 Ansei-Tokai earthquake → tectonicSetting → Nankai Trough ⓘ

1944 Tonankai earthquake → location → Nankai Trough ⓘ

1944 Tonankai earthquake → ruptureZone → Nankai Trough ⓘ

this entity surface form: Tonankai segment of the Nankai Trough

Nankai segment → partOf → Nankai Trough ⓘ

Hyuga-nada segment → associatedWithPlateBoundary → Nankai Trough ⓘ

Kyushu coastal areas → near → Nankai Trough ⓘ

1707 Hoei earthquake → location → Nankai Trough ⓘ

Suruga Bay → near → Nankai Trough ⓘ

this entity surface form: Nankai Trough region