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Burgmann, Heinz; Breyer, S.

doi:10.1007/978-3-7091-6761-8_21

Cited by 1 publication

(1 citation statement)

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“…Borehole strain-and tiltmeters can detect short-term elastic deformation transients from nearby SSEs at or below the earth's surface, which can be modeled to quantify the slip on the fault (e.g., Linde et al, 1996). The high spatial resolution (10s of m), global spatial coverage and precision (sub-cm over short distances) of synthetic aperture radarinterferometry (InSAR) (Bürgmann et al, 2000) is particularly well suited to image the distribution of shallow creep on faults around the world (e.g., Doubre and Peltzer, 2007, Jolivet et al, 2012, Thomas et al, 2014a, Turner et al, 2015Pousse Beltran et al, 2016).…”

Section: Geodetic Observationsmentioning

confidence: 99%

The geophysics, geology and mechanics of slow fault slip

Bürgmann

2018

Earth and Planetary Science Letters

336

308

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Modern geodetic and seismologic observations describe the behavior of fault slip over a vast range of spatial and temporal scales. Slip at sub-seismogenic speeds is evident from top to bottom of lithospheric faults and plays an important role throughout the earthquake cycle. Where earthquakes and tremor accompany slow slip, they help illuminate the spatiotemporal evolution of fault slip. Geophysical subsurface imaging and geologic field studies provide information about suitable environments of slow slip. In particular, exhumed fault and shear zones from various depths reveal the importance of multiple deformation processes and fault-zone structures. Most geologic examples feature frictionally weak and velocity-strengthening materials, well-developed mineral fabrics, and abundant veining indicative of near-lithostatic fluid pressure. To produce transient slow slip events and tremor, in addition to the presence of high-pressure fluids a heterogeneous fault-zone structure, composition, and/or metamorphic assemblage may be needed. Laboratory and computational models suggest that velocityweakening slip patches smaller than a critical dimension needed for earthquake nucleation will also fail in slow slip events. Changes in fluid pressure or slip ratecan cause a fault to transition between stable and unstable fault slip behavior. Future interdisciplinary investigations of slow fault slip, directly integrating geophysical, geological and modeling investigations, will further improve our understanding of the dynamics of slow slip and aid in providing more accurate earthquake hazard characterizations.

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