Submarine earthquake

undersea earthquakeunderseaSubmarineunderwater earthquakeoccurs at seaundersea earthquakesunderwater earthquakes
A submarine, undersea, or underwater earthquake is an earthquake that occurs underwater at the bottom of a body of water, especially an ocean.wikipedia
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2011 Tōhoku earthquake and tsunami

Tōhoku earthquake and tsunami2011 Tōhoku earthquakeGreat East Japan earthquake
The 2011 earthquake off the Pacific coast of Tōhoku was a magnitude 9.0–9.1 (M w ) undersea megathrust earthquake off the coast of Japan that occurred at 14:46 JST (05:46 UTC) on Friday 11 March 2011, with the epicentre approximately 70 km east of the Oshika Peninsula of Tōhoku and the hypocenter at an underwater depth of approximately 29 km.

Earthquake

earthquakesseismic activityseismic
A submarine, undersea, or underwater earthquake is an earthquake that occurs underwater at the bottom of a body of water, especially an ocean.
Tsunamis are long-wavelength, long-period sea waves produced by the sudden or abrupt movement of large volumes of water—including when an earthquake occurs at sea.

2004 Indian Ocean earthquake and tsunami

2004 Indian Ocean earthquake2004 Indian Ocean tsunami2004 tsunami
It was an undersea megathrust earthquake that registered a magnitude of 9.1–9.3, reaching a Mercalli intensity up to IX in certain areas.

Tsunami

tsunamistidal waveseaquake
They are the leading cause of tsunamis.
The Ancient Greek historian Thucydides suggested in his 5th century BC History of the Peloponnesian War that tsunamis were related to submarine earthquakes, but the understanding of tsunamis remained slim until the 20th century and much remains unknown.

Bay of Bengal

Gulf of BengalHarkandBay of Bangal
The Sumatra-Andaman earthquake and Asian tsunami was a result of the pressure at this zone causing a submarine earthquake which then resulted in a destructive tsunami.

Underwater environment

underwatersubmergedundersea
A submarine, undersea, or underwater earthquake is an earthquake that occurs underwater at the bottom of a body of water, especially an ocean.

Seabed

sea floorocean floorseafloor
A submarine, undersea, or underwater earthquake is an earthquake that occurs underwater at the bottom of a body of water, especially an ocean.

Body of water

bodies of waterwater bodieswaterbodies
A submarine, undersea, or underwater earthquake is an earthquake that occurs underwater at the bottom of a body of water, especially an ocean.

Ocean

marineoceansmaritime
A submarine, undersea, or underwater earthquake is an earthquake that occurs underwater at the bottom of a body of water, especially an ocean.

Moment magnitude scale

moment magnitudeM w magnitude
The magnitude can be measured scientifically by the use of the moment magnitude scale and the intensity can be assigned using the Mercalli intensity scale.

Modified Mercalli intensity scale

Mercalli intensityMercalli intensity scaleMMI
The magnitude can be measured scientifically by the use of the moment magnitude scale and the intensity can be assigned using the Mercalli intensity scale.

Plate tectonics

tectonic platesplate tectonictectonic
Understanding plate tectonics helps to explain the cause of submarine earthquakes.

Lithosphere

continental lithosphereoceaniclithospheric
The Earth's surface or lithosphere comprises tectonic plates which average approximately 50 miles in thickness, and are continuously moving very slowly upon a bed of magma in the asthenosphere and inner mantle.

Asthenosphere

asthenosphericasthenospheric mantleaesthenosphere
The Earth's surface or lithosphere comprises tectonic plates which average approximately 50 miles in thickness, and are continuously moving very slowly upon a bed of magma in the asthenosphere and inner mantle.

Mantle (geology)

mantleEarth's mantlemantles
The Earth's surface or lithosphere comprises tectonic plates which average approximately 50 miles in thickness, and are continuously moving very slowly upon a bed of magma in the asthenosphere and inner mantle.

Aseismic creep

aseismicfault creepaseismic sliding
Little movements called fault creep are minor and not measurable.

Epicenter

epicentreepicentralepicentral distance
This area of slippage both horizontally and vertically is called the epicenter, and has the highest magnitude, and causes the greatest damage.

Continent

continentssubcontinentcontinental
As with a continental earthquake the severity of the damage is not often caused by the earthquake at the rift zone, but rather by events which are triggered by the earthquake.

Submarine communications cable

submarine cablesubmarine telecommunications cable systemsubmarine telegraph cable
Submarine earthquakes can also damage submarine communications cables, leading to widespread disruption of the Internet and international telephone network in those areas.

Internet

onlinethe Internetweb
Submarine earthquakes can also damage submarine communications cables, leading to widespread disruption of the Internet and international telephone network in those areas.

Public switched telephone network

PSTNpublic telephone networktelephone network
Submarine earthquakes can also damage submarine communications cables, leading to widespread disruption of the Internet and international telephone network in those areas.

Ring of Fire

Pacific Ring of Firecircum-Pacific orogenic beltPacific Rim
This is particularly common in Asia, where many submarine links cross submarine earthquake zones along Pacific Ring of Fire. Some of the main areas of large tsunami producing submarine earthquakes are the Pacific Ring of Fire and the Great Sumatran fault.

Great Sumatran fault

Sumatran Fault Zone
Some of the main areas of large tsunami producing submarine earthquakes are the Pacific Ring of Fire and the Great Sumatran fault. Therefore, the site of the sub oceanic trench will be a site of submarine earthquakes; for example the Mariana Trench, Puerto Rico Trench, and the volcanic arc along the Great Sumatran fault.

Convergent boundary

convergent plate boundaryconvergenceconvergent boundaries
The location where the two oceanic plates actually meet become deeper and deeper creating trenches with each successive action.

Oceanic trench

trenchtrenchesocean trench
Therefore, the site of the sub oceanic trench will be a site of submarine earthquakes; for example the Mariana Trench, Puerto Rico Trench, and the volcanic arc along the Great Sumatran fault.