Articles | Volume 13, issue 3
https://doi.org/10.5194/se-13-761-2022
© Author(s) 2022. 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-13-761-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Tectonic Geomorphology and Paleoseismology of the Sharkhai fault: a new source of seismic hazard for Ulaanbaatar (Mongolia)
Abeer Al-Ashkar
Institut Terre et Environnement de Strasbourg, UMR 7063,
Université de Strasbourg/EOST, CNRS; 5 rue René Descartes,
Strasbourg, 67084, France
Antoine Schlupp
CORRESPONDING AUTHOR
Institut Terre et Environnement de Strasbourg, UMR 7063,
Université de Strasbourg/EOST, CNRS; 5 rue René Descartes,
Strasbourg, 67084, France
Matthieu Ferry
Géosciences Montpellier, Université de Montpellier – CNRS,
Montpellier, France
Ulziibat Munkhuu
Institute of Astronomy and Geophysics, Mongolian Academy of
Sciences, Ulaanbaatar, Mongolia
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Short summary
We present first constraints for the Sharkhai active fault near the capital city of Mongolia. The fault length is ~ 40 km, and the last earthquake occurred between 775 CE and 1778 CE and the previous between 1605 BCE and 835 BCE. We propose two possible scenarios with likely magnitudes of 6.7 ± 0.2 or 7.1 ± 0.7 and derive preliminary estimates of long-term slip rates. The Sharkhai fault should be considered in the seismic hazard assessment for Ulaanbaatar.
We present first constraints for the Sharkhai active fault near the capital city of Mongolia....