Articles | Volume 12, issue 5
https://doi.org/10.5194/se-12-1197-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-12-1197-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Conditional probability of distributed surface rupturing during normal-faulting earthquakes
Maria Francesca Ferrario
CORRESPONDING AUTHOR
Università dell'Insubria, Dipartimento di Scienza e Alta
Tecnologia, Como 22100, Italy
Franz Livio
Università dell'Insubria, Dipartimento di Scienza e Alta
Tecnologia, Como 22100, Italy
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I mapped over 5000 landslides triggered by a moment magnitude 6.0 earthquake that occurred in 2015 in the Sabah region (Malaysia). I analyzed their number, dimension and spatial distribution by dividing the territory into 1 km2 cells. I applied the Environmental Seismic Intensity (ESI-07) scale, which allows the categorization of earthquake damage due to environmental effects. The presented approach promotes the collaboration among the experts in landslide mapping and in ESI-07 assignment.
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Maria Francesca Ferrario
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Subject area: The evolving Earth surface | Editorial team: Rock deformation, geomorphology, morphotectonics, and paleoseismology | Discipline: Tectonics
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Relative timing of uplift along the Zagros Mountain Front Flexure (Kurdistan Region of Iraq): Constrained by geomorphic indices and landscape evolution modeling
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Xiong Ou, Anne Replumaz, and Peter van der Beek
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The low-relief, mean-elevation Baima Xueshan massif experienced slow exhumation at a rate of 0.01 km/Myr since at least 22 Ma and then regional rock uplift at 0.25 km/Myr since ~10 Ma. The high-relief, high-elevation Kawagebo massif shows much stronger local rock uplift related to the motion along a west-dipping thrust fault, at a rate of 0.45 km/Myr since at least 10 Ma, accelerating to 1.86 km/Myr since 1.6 Ma. Mekong River incision plays a minor role in total exhumation in both massifs.
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The Patos-Marinza oil field in Central Albania (40.71° N, 19.61° E) is one of the largest onshore oil fields in Europe. More than 7 million oil barrels are extracted per year from sandstone formations in western Albania. The regional seismicity culminated in December 2016, when a seismic sequence developed in the oil field, triggering the opening of a public inquiry. We take advantage of the Sentinel-1 radar images to show that a strong subsidence, probably induced, is taking place in the field.
Maurizio Ercoli, Emanuele Forte, Massimiliano Porreca, Ramon Carbonell, Cristina Pauselli, Giorgio Minelli, and Massimiliano R. Barchi
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We present a first application of seismic attributes, a well-known technique in the oil and gas industry, to vintage seismic reflection profiles in a seismotectonic study. Our results improve data interpretability, allowing us to detect peculiar geophysical signatures of faulting and a regional seismogenic layer. We suggest a new tool for both seismotectonic research and assessments of the seismic hazard, not only in the central Apennines (Italy), but also in seismically active areas abroad.
Mjahid Zebari, Christoph Grützner, Payman Navabpour, and Kamil Ustaszewski
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Here, we assessed the maturity level and then relative variation of uplift time of three anticlines along the hanging wall of the Zagros Mountain Front Flexure in the Kurdistan Region of Iraq. We also estimated the relative time difference between the uplift time of more mature anticlines and less mature ones to be around 200 kyr via building a landscape evolution model. These enabled us to reconstruct a spatial and temporal evolution of these anticlines.
Michelle E. Gilmore, Nadine McQuarrie, Paul R. Eizenhöfer, and Todd A. Ehlers
Solid Earth, 9, 599–627, https://doi.org/10.5194/se-9-599-2018, https://doi.org/10.5194/se-9-599-2018, 2018
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We examine the Himalayan Mountains of Bhutan by integrating balanced geologic cross sections with cooling ages from a suite of mineral systems. Interpretations of cooling ages are intrinsically linked to both the motion along faults as well as the location and magnitude of erosion. In this study, we use flexural and thermal kinematic models to understand the sensitivity of predicted cooling ages to changes in fault kinematics, geometry, and topography.
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Short summary
Moderate to strong earthquakes commonly produce surface faulting, either along the primary fault or as distributed rupture on nearby faults. Hazard assessment for distributed normal faulting is based on empirical relations derived almost 15 years ago. In this study, we derive updated empirical regressions of the probability of distributed faulting as a function of distance from the primary fault, and we propose a conservative scenario to consider the full spectrum of potential rupture.
Moderate to strong earthquakes commonly produce surface faulting, either along the primary fault...