TY - JOUR AU - AB - https://doi.org/10.1146/annurev-earth-053018- Deep earthquakes behave like shallow earthquakes but must have funda- mentally different physical processes. Their rupture behaviors, magnitude- Copyright © 2020 by Annual Reviews. frequency statistics, and aftershocks are diverse and imperfectly dependent All rights reserved on various factors, such as slab temperature, depth, and magnitude. The three leading mechanisms for deep earthquakes (i.e., transformational fault- ing, dehydration embrittlement, and thermal runaway) can each explain portions of the observations but have potentially fundamental difficulties explaining the rest. This situation calls for more serious consideration of hypotheses that involve more than one mechanism. For example, deep earthquakes may initiate by one mechanism, but the ruptures may prop- agate via another mechanism once triggered. To make further progress, it is critical to evaluate the hypotheses, both single- or dual-mechanism, under conditions as close to those of real slabs as possible to make accurate and specific predictions that are testable using seismic or other geophysical observations. Any new understanding of deep earthquakes promises new constraints on subduction zone structure and dynamics. Deep earthquakes display the complex structure and dynamics of subduction zones in terms of geometry, stress state, rheology, hy- dration, and phase changes. Phase transformation, dehydration, and thermal runaway are TI - Mechanisms and Implications of Deep Earthquakes JF - Annual Review of Earth and Planetary Sciences DO - 10.1146/annurev-earth-053018-060314 DA - 2020-05-30 UR - https://www.deepdyve.com/lp/unpaywall/mechanisms-and-implications-of-deep-earthquakes-Ez3pJo7pjH DP - DeepDyve ER -