DEVELOPMENT MONITORING OF THE C22 GAS BLOWOUT DOUBLET OBJECT ON YAMAL PENINSULA USING REMOTE SENSING DATA

The paper presents a comprehensive study of the C22 gas blowout Doublet object formed in 2023 in the central part of Yamal peninsula carried out with the use of remote sensing (RS) data and unmanned aerial vehicle (UAV). The object is situated 12.7 km south of the Bovanenkovo field. The uniqueness of the C22 crater lies in its location — 230 m from a similar, widely-known C2 object exploded in 2012, which is why the C22 object is named ‘Doublet’. Based on RS data the researchers have determined that within August 23 and September 3, 2023 the C22 permafrost heaving mound (PHM) exploded. According to ArcticDEM data for the period 2011-2023, the features of changes in the size of C22 PHM have been studied, including an abnormally high average growth rate of 44 cm/year three years before its explosion, which can serve as one of the criteria for identifying explosive PHM objects. The UAV data of May 14, 2024 has resulted in building a 3D model, which displays a partially snow-covered cavity in a ground ice massif. The depth of the cavity from the crater parapet is at least 28.5 m, the diameter of the crater neck is about 13 m. In the lower part, the cavity widens to 26 m and additionally extends by at least 8 m in the NNW direction at an azimuth of about 341°, which is consistent with the direction of the faults of the Bovanenkovo field identified by seismic exploration data. The bottom of the cavity has an elliptical shape with the size from 26×33 m to 26×41 m. The study is interdisciplinary and is included in the list of critical technologies for the prevention and reduction of risks of natural and man-made emergencies.

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