Apparent Late Quaternary Fault‐Slip Rate Increase in the Southern Lower Rhine Graben, Central Europe

2017 ◽  
Vol 107 (2) ◽  
pp. 563-580 ◽  
Author(s):  
Ryan D. Gold ◽  
Anke Friedrich ◽  
Simon Kübler ◽  
Martin Salamon
Keyword(s):  
Central Europe ◽  
Rate Increase ◽  
Late Quaternary ◽  
Slip Rate ◽  
Fault Slip ◽  
Rhine Graben ◽  
Fault Slip Rate ◽  
Lower Rhine

scholarly journals Late Quaternary slip rate of the Aksay segment and its rapidly decreasing gradient along the Altyn Tagh fault

Geosphere ◽  
2020 ◽  
Vol 16 (6) ◽  
pp. 1538-1557
Author(s):  
Jinrui Liu ◽  
Zhikun Ren ◽  
Wenjun Zheng ◽  
Wei Min ◽  
Zhigang Li ◽  
...  
Keyword(s):  
Late Quaternary ◽  
Temporal Distribution ◽  
Slip Rate ◽  
Fault Slip ◽  
Strain Partitioning ◽  
Altyn Tagh Fault ◽  
Altyn Tagh ◽  
Fault Slip Rate ◽  
Partitioning Pattern ◽  
Rate Gradient

Abstract Constraining the fault slip rate on a fault can reveal the strain accumulation and partitioning pattern. The Aksay segment, the eastern segment of the Altyn Tagh fault, as the starting area where the slip rate of the Altyn Tagh fault decreases, is a strain partitioning zone. The spatial and temporal distribution of its fault slip rate is of great significance to clarify the strain-partitioning pattern of the eastern Altyn Tagh fault. In this study, we determined the slip rates at four sites along the Aksay segment. The results demonstrated that the slip rate decreases dramatically, with an overwhelmingly high slip gradient of ∼9.8 mm/yr/100 km (a 9.8 mm/yr reduction of slip rate occurs over a distance of 100 km) within a distance of ∼50 km. The slip rate gradient along strike at the Aksay segment is four times that of the Subei segment to the eastward termination of the Altyn Tagh fault. Our results indicate that the slip rate gradient along the Altyn Tagh fault is not uniform and decreases eastward with variable slip rate gradients on different segments, resulting in the uplift of the mountains oblique to the Altyn Tagh 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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