Acccretionary Wedge Aseismicity:  The Seismic Front and     Failure Modes of Sedimentary Rocks
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A fundamental understanding of the deformation behavior and                failure modes of sediments and porous rocks is important in                     understanding the distribution of seismicity in a number of                     geological settings.  This is particularly true of the deepest,                 arcward ends of accretionary wedges, the aseismic masses of                     accreted sediments beneath the landward slopes of many convergent               plate boundaries.                                                                                                                                                    This problem is particularly important in accretionary wedges              because of their aseismicity, and because of the importance of                  understanding the nature of the 'seismic front', which marks the                trenchward limit of plate-boundary thrust earthquakes at or near                the back of the wedge.  Although the lower, thermally controlled,               boundary of the thrusting seismogenic zone is reasonably well                   understood, the shallow limit has not been properly explained.                  Because of the very small dip of the plate boundary at such                     shallow depths, this leads to a great deal of uncertainty about                 the total width of the seismogenic zone, upon which the maximum                 possible earthquake size depends very strongly.
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{'Code': '1574', 'Text': 'Geophysics'}
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