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Disturbance of deep-sea environments induced by the M9.0 Tohoku Earthquake 2012-05-22

The impacts of the M9.0 Tohoku Earthquake on deep-sea environment were investigated 36 and 98 days after the event. The light transmission anomaly in the deep-sea water after 36 days became atypically greater (∼35%) and more extensive (thickness ∼1500 m) near the trench axis owing to the turbulent diffusion of fresh seafloor sediment, coordinated with potential seafloor displacement. In addition to the chemical influx associated with sediment diffusion, an influx of 13C-enriched methane from the deep sub-seafloor reservoirs was estimated. This isotopically unusual methane influx was possibly triggered by the earthquake and its aftershocks that subsequently induced changes in the sub-seafloor hydrogeologic structures.

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Submitted By:- Abhinav
Origin of Article :- MSN
Date of article :- 2012-05-22
Category :- Energy
Sub category :- Renewables
Translated By :- N/A
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