Rupture propagation inferred from damage patterns, slip distribution, and segmentation of the 1957 MW8.1 Gobi‐Altay earthquake rupture along the Bogd fault, Mongolia

摘要: [1] A detailed analysis of the rupture patterns and slip changes along surface associated with 1957 Gobi-Altay earthquake (MW= 8.1) in Mongolia, which occurred Bogd left-lateral strike-slip fault, was carried out to better understand segmentation propagation. The major ruptures show a simple linear pattern, whereas minor ruptures, are concentrated at step overs tip zones, complex patterns. In latter case, their strongly resemble geometric kinematic characteristics previously reported mesoscale fault damage geomorphologic offsets that dominated an average displacement 3.5 4.0 m, but it decreased or transferred dip-slip components mainly step-overs zones. Abrupt distribution indicate coseismic comprises three segments from west east, namely, North-Ih, East-Ih, North-Baga segments, highly damaged eastern zone. Based on location epicenter, as well asymmetrically distributed structures slips, we infer propagated eastward unilaterally through several reached easternmost step-over, acted tough barrier. finally terminated, producing deformed zone developed accommodate released stress. We argue patterns, distribution, transfer can help us