INVERTING FAULT SLIP RATES ON COMPLEX FAULT SYSTEMS TO OBTAIN THE OPTIMAL SPATIAL DISTRIBUTION OF EARTHQUAKES

2020 ◽  
Author(s):  
Eric L. Geist ◽  
◽  
Tom Parsons
Keyword(s):  
Spatial Distribution ◽  
Fault Slip ◽  
Slip Rates ◽  
Fault Systems ◽  
Fault Slip Rates ◽  
Complex Fault

Fault interaction and strain partitioning in southeastern Tibetan Plateau: from kinematics to geodynamics

2020 ◽  
Author(s):  
Li Yin
Keyword(s):  
Tibetan Plateau ◽  
Fault Slip ◽  
Fault System ◽  
Strain Partitioning ◽  
Fault Interaction ◽  
Slip Rates ◽  
Southeastern Tibetan Plateau ◽  
Fault Systems ◽  
Fault Strength ◽  
Fault Slip Rates

<p>In southeastern Tibetan Plateau, the Xianshuihe-Xiaojiang fault system (XXFS) and its neighboring fault systems collectively accommodates the material extrusion of the Tibetan Plateau. However we do not mechanically understand how these faults interact with each other and how the fault interaction impacts strain partitioning, fault slip rates, and seismicity in this region. We develop and use a three-dimensional viscoelastoplastic finite element model to simulate regional deformation, fault slip rates, and fault interaction in the fault system of southeastern Tibetan Plateau. We investigate the effects of inception and activity of faults, fault strength, lithospheric rheology, and topography on partitioning of strain and fault slip rates. Model results show that fault strength, lithospheric rheology, and topography all significantly influence the strain partitioning and slip rates on faults. The initiation of the Daliangshan fault results mainly from the non-smooth fault geometry of the main trace of the XXFS. Our model results support the hypothesis of codependent slip rate between fault systems. For the present fault configuration, our model predicts localized strain in the Daliangshan faults, Yingjing-Mabian faults, and Lianfeng-Zhaotong faults, where numerous earthquakes occurred in recent years.</p>

scholarly journals New geodetic constraints on southern San Andreas fault-slip rates, San Gorgonio Pass, California

Geosphere ◽  
2020 ◽  
Author(s):  
Katherine A. Guns ◽  
Richard A Bennett ◽  
Joshua C. Spinler ◽  
Sally F. McGill
Keyword(s):  
Velocity Field ◽  
Southern California ◽  
San Andreas Fault ◽  
Plate Boundary ◽  
Slip Rate ◽  
Fault Slip ◽  
Slip Rates ◽  
San Andreas ◽  
Fault Slip Rates ◽  
Gps Velocity Field

Assessing fault-slip rates in diffuse plate boundary systems such as the San Andreas fault in southern California is critical both to characterize seis­mic hazards and to understand how different fault strands work together to accommodate plate boundary motion. In places such as San Gorgonio Pass, the geometric complexity of numerous fault strands interacting in a small area adds an extra obstacle to understanding the rupture potential and behavior of each individual fault. To better understand partitioning of fault-slip rates in this region, we build a new set of elastic fault-block models that test 16 different model fault geometries for the area. These models build on previ­ous studies by incorporating updated campaign GPS measurements from the San Bernardino Mountains and Eastern Transverse Ranges into a newly calculated GPS velocity field that has been removed of long- and short-term postseismic displacements from 12 past large-magnitude earthquakes to estimate model fault-slip rates. Using this postseismic-reduced GPS velocity field produces a best- fitting model geometry that resolves the long-standing geologic-geodetic slip-rate discrepancy in the Eastern California shear zone when off-fault deformation is taken into account, yielding a summed slip rate of 7.2 ± 2.8 mm/yr. Our models indicate that two active strands of the San Andreas system in San Gorgonio Pass are needed to produce sufficiently low geodetic dextral slip rates to match geologic observations. Lastly, results suggest that postseismic deformation may have more of a role to play in affecting the loading of faults in southern California than previously thought.

scholarly journals Geomorphological reconnaissance of the Psathopyrgos and Rion-Patras Fault zones (Achaia, NW Peloponnesus).

2007 ◽  
Vol 40 (4) ◽  
pp. 1586 ◽  
Author(s):  
N. Palyvos ◽  
D. Pantosti ◽  
L. Stamatopoulos ◽  
P. M. De Martini
Keyword(s):  
Fault Zone ◽  
Fault Zones ◽  
Fault Slip ◽  
Geological Data ◽  
Slip Rates ◽  
The Holocene ◽  
Fault Slip Rates ◽  
Earthquake Ruptures ◽  
Surficial Deposits

In this communication we discuss reconnaissance geomorphological observations along the active Psathopyrgos and Rion-Patras (NE part) fault zones. These fault zones correspond to more or less complex rangefronts, the geomorphic characteristics of which provide hints on the details of the fault zone geometries, adding to the existing geological data in the bibliography. Aiming at the identification of locations suitable or potentially suitable for geomorphological and geological studies for the determination of fault slip rates in the Holocene, we describe cases of faulted Holocene landforms and associated surficial deposits. We also discuss problems involved in finding locations suitable for geological (paleoseismological) studies for the determination of the timing of recent earthquake ruptures, problems due to both man-made and natural causes.

A meta‐analysis of fault slip rates across the central Apennines

2021 ◽  
Author(s):  
M. M. C. Carafa ◽  
D Di Naccio ◽  
C. Di Lorenzo ◽  
V. Kastelic ◽  
P. Bird
Keyword(s):  
Meta Analysis ◽  
Fault Slip ◽  
Central Apennines ◽  
Slip Rates ◽  
Fault Slip Rates
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