A team of researchers have shed light on the causes of the devastating tsunami that struck Japan's Tohoku region in March 2011.
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Prof. Rowe, of McGill's Department of Earth and Planetary Sciences, was one of 27 scientists from 10 countries who participated in a 50-day expedition in 2012 on the Japanese drilling vessel Chikyu.
The team drilled three holes in the Japan Trench area to study the rupture zone of the 2011 earthquake, a fault in the ocean floor where two of the Earth's major tectonic plates meet, deep beneath the surface of the Pacific Ocean.
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The latter plate bends and plunges deep into the earth, forming the Japan Trench.
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Closer to the surface of the seafloor, where rocks are softer and less compressed, this rebound effect was thought to taper off.
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The scientists also discovered that the clay deposits that fill the narrow fault are made of extremely fine sediment.
The discovery of this unusual clay in the Tohoku slip zone suggests that other subduction zones in the northwest Pacific where this type of clay is present - from Russia's Kamchatka peninsula to the Aleutian Islands - may be capable of generating similar, huge earthquakes, Rowe added.
Source-ANI
