scholarly journals The advance in obtaining fault slip rate of strike slip fault-A review

2021 ◽  
pp. 100032
Author(s):  
Jinrui Liu ◽  
Zhikun Ren ◽  
Wei Min ◽  
Guanghao Ha ◽  
Jinghao Lei
Keyword(s):  
Slip Rate ◽  
Strike Slip ◽  
Fault Slip ◽  
Strike Slip Fault ◽  
Fault Slip Rate

Improved Scaling Relationships for Seismic Moment and Average Slip of Strike-Slip Earthquakes Incorporating Fault-Slip Rate, Fault Width, and Stress Drop

2021 ◽  
Author(s):  
John G. Anderson ◽  
Glenn P. Biasi ◽  
Stephen Angster ◽  
Steven G. Wesnousky
Keyword(s):  
Stress Drop ◽  
Seismic Moment ◽  
Likelihood Function ◽  
Surface Displacement ◽  
Slip Rate ◽  
Strike Slip ◽  
Fault Slip ◽  
Constant Stress ◽  
Rupture Length ◽  
Fault Slip Rate

ABSTRACT We develop a self-consistent scaling model relating magnitude Mw to surface rupture length (LE), surface displacement DE, and rupture width WE, for strike-slip faults. Knowledge of the long-term fault-slip rate SF improves magnitude estimates. Data are collected for 55 ground-rupturing strike-slip earthquakes that have geological estimates of LE, DE, and SF, and geophysical estimates of WE. We begin with the model of Anderson et al. (2017), which uses a closed form equation for the seismic moment of a surface-rupturing strike-slip fault of arbitrary aspect ratio and given stress drop, ΔτC. Using WE estimates does not improve Mw estimates. However, measurements of DE plus the relationship between ΔτC and surface slip provide an alternate approach to study WE. A grid of plausible stress drop and width pairs were used to predict displacement and earthquake magnitude. A likelihood function was computed from within the uncertainty ranges of the corresponding observed Mw and DE values. After maximizing likelihoods over earthquakes in length bins, we found the most likely values of WE for constant stress drop; these depend on the rupture length. The best-fitting model has the surprising form WE∝logLE—a gentle increase in width with rupture length. Residuals from this model are convincingly correlated to the fault-slip rate and also show a weak correlation with the crustal thickness. The resulting model thus supports a constant stress drop for ruptures of all lengths, consistent with teleseismic observation. The approach can be extended to test other observable factors that might improve the predictability of magnitude from a mapped fault for seismic hazard analyses.

scholarly journals Slip‐rate on the Main Köpetdag (Kopeh Dagh) Strike‐slip fault, Turkmenistan, and the active tectonics of the South Caspian

Tectonics ◽  
2021 ◽  
Author(s):  
Richard Thomas Walker ◽  
Y. Bezmenov ◽  
G. Begenjev ◽  
S. Carolin ◽  
N. Dodds ◽  
...  
Keyword(s):  
Active Tectonics ◽  
Slip Rate ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
The South

scholarly journals The structure and late Quaternary slip rate of the Rafsanjan strike-slip fault, SE Iran

Geosphere ◽  
2011 ◽  
Vol 7 (5) ◽  
pp. 1159-1174 ◽  
Author(s):  
M. Fattahi ◽  
R.T. Walker ◽  
M. Talebian ◽  
R.A. Sloan ◽  
A. Rasheedi
Keyword(s):  
Late Quaternary ◽  
Slip Rate ◽  
Strike Slip ◽  
Strike Slip Fault

scholarly journals Reproducibility of San Andreas Fault Slip Rate Measurements at Wallace Creek in the Carrizo Plain, CA

2019 ◽  
Vol 6 (1) ◽  
pp. 156-165 ◽  
Author(s):  
Lisa Grant Ludwig ◽  
Sinan O. Akciz ◽  
J Ramon Arrowsmith ◽  
J. Barrett Salisbury
Keyword(s):  
San Andreas Fault ◽  
Slip Rate ◽  
Fault Slip ◽  
San Andreas ◽  
Fault Slip Rate

Fault scarps and deformation rates in Lazio–Abruzzo, Central Italy: Comparison between geological fault slip-rate and GPS data

2005 ◽  
Vol 408 (1-4) ◽  
pp. 147-176 ◽  
Author(s):  
Ioannis D. Papanikolaou ◽  
Gerald P. Roberts ◽  
Alessandro M. Michetti
Keyword(s):  
Central Italy ◽  
Slip Rate ◽  
Fault Slip ◽  
Gps Data ◽  
Geological Fault ◽  
Fault Slip Rate ◽  
Fault Scarps

Fault Slip Rate of the Kazerun Fault System (KFS), Iran, Investigated Using Finite Element Modeling

2015 ◽  
Vol 172 (10) ◽  
pp. 2495-2516
Author(s):  
Bijan Shoorcheh ◽  
Mahdi Motagh ◽  
Marzieh Baes ◽  
Abbas Bahroudi
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Slip Rate ◽  
Fault Slip ◽  
Fault System ◽  
Element Modeling ◽  
Fault Slip Rate

Locking Behavior of Main Marmara Fault in Western Turkey During Interseismic Period

2020 ◽  
Author(s):  
Zeynep Yılmaz ◽  
Ali Özgün Konca ◽  
Semih Ergintav
Keyword(s):  
3D Structure ◽  
Slip Rate ◽  
Fault Slip ◽  
North Anatolian Fault ◽  
Gps Data ◽  
Strain Accumulation ◽  
Sea Of Marmara ◽  
Western Turkey ◽  
The North ◽  
Fault Slip Rate

<p>The North Anatolian Fault (NAF) produced multiple earthquakes of M>7 throughout the 20th century, while the part of NAF beneath Sea of Marmara did not rupture during this period. Analysis of the Main Marmara Fault's interseismic behavior, the most active branch of the North Anatolian Fault in this region, in terms of locking depth and fault slip rate is critical for evaluating the region's seismic risk with a population of more than 20 million, as it provides information about the seismic moment deficit that may release in a potential future earthquake.</p><p>In this study, we modeled the Main Marmara Fault's interseismic locking with realistic geometry and 3D structure including sedimentary basins, by implementing a 3D finite element approach and using interseismic GPS velocities. We have optimized the fits with GPS data by evaluating cases where each fault segment is constrained by a fault slip rate below a predefined locking depth ranging from 0 to 20 km. Preliminary models reveal that a difference in locking depth is required between the Western Marmara and the eastern end of the Ganos Segment entering the Sea of Marmara. This result, which is consistent with seismicity studies and other previous studies using 1D profiles shows that the strain accumulation under Western Marmara is less and that the locking depths or couplings are not similar in these two segments. For the Princes' Islands Segment, further analysis is required due to complexity in the GPS data. Recent earthquakes along Silivri also indicate that the strain accumulation is complex with most mechanisms showing significant thrust component. We have also calculated various possible strain accumulation patterns and compared the strain rate field around the Main Marmara Fault. Our results show that in most cases the change in the seismicity of each segment is consistent with the interseismic behavior associated with its fault locking.</p><p>(This research has been supported by Boğaziçi University Scientific Research Projects Coordination Unit. Project Number: 15022, 2019)</p>

Assessing the potential of luminescence dating for fault slip rate studies on the Garlock fault, Mojave Desert, California, USA

2012 ◽  
Vol 10 ◽  
pp. 285-290 ◽  
Author(s):  
Belinda Roder ◽  
Mike Lawson ◽  
Edward J. Rhodes ◽  
James Dolan ◽  
Lee McAuliffe ◽  
...  
Keyword(s):  
Mojave Desert ◽  
Slip Rate ◽  
Fault Slip ◽  
Luminescence Dating ◽  
Garlock Fault ◽  
Fault Slip Rate

scholarly journals A systems-based approach to parameterise seismic hazard in regions with little historical or instrumental seismicity: The South Malawi Active Fault Database

2020 ◽  
Author(s):  
Jack N. Williams ◽  
Hassan Mdala ◽  
Åke Fagereng ◽  
Luke N. J. Wedmore ◽  
Juliet Biggs ◽  
...  
Keyword(s):  
Seismic Hazard ◽  
Active Fault ◽  
Slip Rate ◽  
Fault Slip ◽  
Slip Rates ◽  
Scaling Relationships ◽  
Regional Strain ◽  
Earthquake Scaling ◽  
Recurrence Intervals ◽  
Fault Slip Rate

Abstract. Seismic hazard is frequently characterised using instrumental seismic records. However, in regions where the instrumental record is short relative to earthquake repeat times, extrapolating it to estimate seismic hazard can misrepresent the probable location, magnitude, and frequency of future large earthquakes. Although paleoseismology can address this challenge, this approach requires certain geomorphic settings and carries large inherent uncertainties. Here, we outline how fault slip rates and recurrence intervals can be estimated through an approach that combines fault geometry, earthquake-scaling relationships, geodetically derived regional strain rates, and geological constraints of regional strain distribution. We then apply this approach to the southern Malawi Rift where, although no on-fault slip rate measurements exist, there are theoretical and observational constraints on how strain is distributed between border and intrabasinal faults. This has led to the development of the South Malawi Active Fault Database (SMAFD), the first database of its kind in the East African Rift System (EARS) and designed so that the outputs can be easily incorporated into Probabilistic Seismic Hazard Analysis. We estimate earthquake magnitudes of MW 5.4–7.2 for individual fault sections in the SMAFD, and MW 6.0–7.8 for whole fault ruptures. These potentially high magnitudes for continental normal faults reflect southern Malawi's 11–140 km long faults and thick (30–35 km) seismogenic crust. However, low slip rates (intermediate estimates 0.05–0.8 mm/yr) imply long recurrence intervals between events: 102–105 years for border faults and 103–106 years for intrabasinal faults. Sensitivity analysis indicates that the large range of these estimates can be reduced most significantly from an improved understanding of the rate and partitioning of rift-extension in southern Malawi, earthquake scaling relationships, and earthquake rupture scenarios. Hence these are critical areas for future research. The SMAFD provides a framework for using geological and geodetic information to characterize seismic hazard in low strain rate settings with few on-fault slip rate measurements, and could be adapted for use elsewhere in the EARS or globally.

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