Аннотация
Geophysical observations from the 2011 Mw 9.0 Tohoku-Oki, Japan, earthquake
allow exploration of a rare large event along a subduction megathrust.
Models for this event indicate that the distribution of coseismic
fault slip exceeded 50 m in places. Sources of high-frequency seismic
waves delineate the edges of the deepest portions of coseismic slip
and do not simply correlate with the locations of peak slip. Relative
to the Mw 8.8 2010 Maule, Chile, earthquake, the Tohoku-Oki earthquake
was deficient in high-frequency seismic radiation--a difference that
we attribute to its relatively shallow depth. Estimates of total
fault slip and surface secular strain accumulation on millennial
time scales suggest the need to consider the potential for a future
large earthquake just south of this event.
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