...James J. Lienkaemper; Forrest S. McFarland Abstract We present the longest record of surface afterslip on a continental strike‐slip fault for the 2004 M 6.0 Parkfield, California, earthquake, from which we can derive critical information about the duration and predictability of afterslip relevant...

... in the north. We measured the accumulation of postseismic surface slip on four ∼100‐m‐long alignment arrays for one year following the event. Because prolonged afterslip can delay reconstruction of fault‐damaged buildings and infrastructure, we analyzed its gradual decay to estimate when significant afterslip...

... of the northern Sumatra subduction zone. We have developed a 3D viscoelastic finite‐element model to study the postseismic deformation of the 2004 and 2005 events. The time‐dependent and stress‐driven afterslip is simulated by a 2‐km‐thick shear zone. Model results indicate that the viscosity of the shear zone...

... controversial. Here, we utilize the integration of Interferometric Synthetic Aperture Radar observations and 2D finite element models incorporating various fault geometries such as planar faults, ramp‐flat faults, and the combined models of ramp‐flat and splay faults to explore frictional afterslip process due...

...Shunying Hong; Mian Liu; Xin Zhou; Guojie Meng; Yanfang Dong ABSTRACT Afterslip could help to reveal seismogenic fault structure. The 2020 M w 6.3 Nima earthquake happened in a pull‐apart basin within the Qiangtang block, central Tibetan plateau. Previous studies have explained the coseismic...

... of Utah Seismograph Stations network. We find that coseismic slip and afterslip, with predominantly normal slip, distributed on a shallowly west‐dipping plane, possibly augmented by afterslip on a steeply northeast‐dipping plane, best fits the joint dataset. The west‐dipping plane locates near previously...

... complementarity of slip between the M w 6.4 foreshock, M w 7.1 mainshock, and afterslip suggests the importance of static stress transfer as a triggering mechanism during the rupture sequence. The coseismic slip of the foreshock concentrates mainly on the east‐northeast–west‐southwest fault above the hypocenter...

... et al. (2003) . We found no evidence for triggered surface fractures at this location. The largest observed epicentral afterslip signal (1.1 mm in four months) occurred on the M w  6.4 rupture (Fig.  5 ). Elsewhere, signals across faults were less than 0.1 mm. These small signals...

...Rumeng Guo; Yong Zheng; Jianqiao Xu; Muhammad Shahid Riaz Abstract It is usually assumed that short‐term (a few years) postseismic deformation around the rupture zone is caused by continuing slip (afterslip) along the fault interface, and viscoelastic stress relaxation is only responsible for long...

...Eugenio Lippiello; Giuseppe Petrillo; François Landes; Alberto Rosso Abstract Whether aftershocks originate directly from the mainshock and surrounding stress environment or from afterslip dynamics is crucial to the understanding of the nature of aftershocks. We build on a classical description...

... of this postseismic afterslip offers an additional explanation of the difference between the static and strong‐motion‐derived slip models, particularly along the shallowest portion (<2  km) of segment S1 where the coseismic model has very little slip. The M w  6.1 South Napa earthquake occurred near Napa...

...Brad T. Aagaard; James J. Lienkaemper; David P. Schwartz Abstract We examine the partition of long‐term geologic slip on the Hayward fault into interseismic creep, coseismic slip, and afterslip. Using Monte Carlo simulations, we compute expected coseismic slip and afterslip at three alinement array...

...Joan Gomberg; Stephanie Prejean; Natalia Ruppert Abstract We tested the hypothesis that afterslip should be accompanied by tremor using observations of seismic and aseismic deformation surrounding the 2002 M 7.9 Denali fault, Alaska, earthquake ( DFE ). Afterslip happens more frequently than...

...-strengthening frictional afterslip. Online material: Summary of geodetic data used in this study. This study aims to provide a better understanding of the coseismic slip distribution and postseismic afterslip of the 2004 Sumatra–Andaman earthquake using a more comprehensive set of geodetic data that have...

.... The Parkfield segment is a transition between the locked section to the southeast that last ruptured in the 1857 Fort Tejon earthquake and the creeping section to the northwest. We develop three-dimensional rate- and state-dependent friction models of afterslip following the 2004 earthquake to investigate...

... of an earlier creep event of similar magnitude and duration to the ones that followed. If this indeed occurred, the cumulative afterslip to 21 October is 9-10 mm at each location. A coseismic step in the signal may have occurred at each site, however, due either to static strain or inertial shaking effects...

... 1999 Düzce earthquake indicate rapidly decaying aseismic fault slip on and well below the coseismic rupture. Elastic model inversions for time-dependent distributed fault slip, using a network inversion filter approach, show that afterslip was highest between and below the regions of maximum coseismic...

... installed on the fault as early as 4 days after the mainshock have recorded afterslip amplitudes of more than 8 cm on the northern half of the mapped fault. The maximum observed slip 1 yr after the earthquake is 23 ± 2 cm, and an additional 1 to 3 cm of afterslip may occur on the fault in the next decade...

... . Savage J. C. Church J. P. (1975) . Evidence for afterslip on the San Fernando fault , Bull. Seism. Soc. Am. 65 , 829 - 834 . Sylvester A. G...

...R. C. Bucknam; George Plafker; R. V. Sharp Abstract Field studies of surface faulting associated with the Guatemala earthquake of February 4, 1976, have documented the occurrence of afterslip at seven locations along the 230 km of surface rupture. The total displacement across the fault as measured...