Automation of Processing Large Volumes of Seismological Data When Studying Seismicity in the Khuvsgul Region for 2014–2016

This study uses open data from an international experiment in Central Mongolia, in particular, data from temporary stations deployed in the area of Lake Khuvsgul. This network consisted of 26 stations and operated in 2014–2016. This time interval includes an interesting for consideration, fairly large event with an aftershock process that occurred directly under Lake Khuvsgul on December 5, 2014, with a magnitude ML = 5.2. Event detection and location is performed automatically using a publicly available AI-based detector, EQTransformer, designed to simultaneously detect earthquake signals and determine the P and S phases from single station data records, a phase associator using grid search, and a Hypoinverse event locator, which is also open source. The following results were obtained: the focal zone of the Khuvsgul earthquake of 2014 has no contact with the focal zone of the Khuvsgul earthquake of 2021 and is not related to the known faults in this area; at the level of weak earthquakes ML < 2, increased activity is noted in the northern part of the Darkhad depression, as well as along the western side of the Khuvsgul depression; from the east, in the seismicity structure, an increased number of earthquakes is noted not only in the Busingol and Belin depressions, but also in the internal regions of the Shishkhid Highlands; During the experiment, there are no earthquakes in the area of the focal zone of the Khuvsgul earthquake of 2021 and in the area of development of the Darkhad earthquake swarm in 2022–2023.