Articles | Volume 13, issue 3
https://doi.org/10.5194/se-13-761-2022
https://doi.org/10.5194/se-13-761-2022
Research article
 | 
31 Mar 2022
Research article |  | 31 Mar 2022

Tectonic Geomorphology and Paleoseismology of the Sharkhai fault: a new source of seismic hazard for Ulaanbaatar (Mongolia)

Abeer Al-Ashkar, Antoine Schlupp, Matthieu Ferry, and Ulziibat Munkhuu

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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.