The 2021 Mw6.7 Lake Hovsgol (Mongolia) Earthquake: Irregular Normal Faulting with Slip Partitioning Controlled by an Adjacent Strike-Slip Fault

In transtensional regions, structures striking obliquely to the extension direction generally exhibit oblique or partitioned slips. However, their on-fault partitioning patterns and controlling factors are less known, hindering our understanding of evolution rifting process. Here, we study slip distribution 2021 Mw6.7 Lake Hovsgol (Mongolia) earthquake occurred in a pull-apart basin using InSAR observations. Our preferred model shows remarkable feature, with three zones exhibiting distinct directions at different depths. The Coulomb stress change analysis reveals that this pattern is likely controlled by left-lateral motion Mondy Fault north, which also inhibits growth boundary fault east lake, shaping asymmetric graben structure region. results imply important role major strike-slip faults bounding formation rift.