AI Article Synopsis
- The 2011 Tohoku-oki earthquake struck the Japan Trench, highlighting the dangers of subduction of the Pacific plate and resulting in significant earthquakes and tsunamis.
- Advanced observation networks collected extensive data on the event, revealing unexpected coseismic fault slips and varied lateral slip near the trench.
- Although the probability of another massive earthquake in the near future is low, the possibility of a large normal fault earthquake in the region remains a serious concern.
Article Abstract
The 2011 Tohoku-oki earthquake occurred in the Japan Trench 10 years ago, where devastating earthquakes and tsunamis have repeatedly resulted from subduction of the Pacific plate. Densely instrumented seismic, geodetic, and tsunami observation networks precisely recorded the event, including seafloor observations. A large coseismic fault slip that unexpectedly extended to a shallow part of megathrust fault was documented. Strong lateral variations of the coseismic slip near the trench were recorded from marine geophysical studies, along with a possible cause of these variations. The seismic activities in east Japan are still higher than those before the earthquake, and crustal deformation is still occurring. Although the recurrence probability of a great earthquake (magnitude = ~9) in the Japan Trench in the near future is very low, a large normal fault earthquake seaward of the Japan Trench is a concerning possibility.
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| http://dx.doi.org/10.1126/science.abe1169 | DOI Listing |
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