The 2020 M 6.5 Stanley, Idaho, earthquake produced rupture in the north of the active Sawtooth fault in the northern basin and range at depth, without any observable surface rupture. Global Positioning System (GPS) and Interferometric Synthetic Aperture Radar (InSAR) data yield several millimeters of static offsets out to ∼100 km from the rupture and up to ∼0.1 m of near‐field crustal deformation. We combine the GPS and InSAR data with long‐period regional seismic waveforms to derive models of kinematic slip and afterslip. We find that the coseismic rupture is complex, likely involving up to 2 m combined left‐lateral strike slip and normal slip on a previously unidentified ∼south‐southeast‐striking fault. This slip is predominantly left‐lateral strike slip, different from the dominant east‐northeast–west‐northwest normal faulting of the region. At least one ∼northeast‐trending fault, likely associated with the Trans‐Challis fault system, is inferred to have accommodated a few decimeters of right‐lateral afterslip, consistent with vigorous aftershock activity at depth along northeast‐trending lineations.

中文翻译：

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根据地震波形和大地测量数据推断，爱达荷州史丹利6.5级地震的破裂过程

爱达荷州史丹利（Stanley）2020 M 6.5地震在北部盆地和深度范围内活动锯齿断层以北产生破裂，而没有任何可观察到的表面破裂。全球定位系统（GPS）和干涉合成孔径雷达（InSAR）数据可产生距破裂点约100 km的几毫米的静态偏移，以及近场地壳形变的约0.1 m。我们将GPS和InSAR数据与长期区域地震波形结合起来，得出运动滑移和后滑的模型。我们发现，同震破裂是复杂的，可能涉及到一个先前未识别的南东突触断层，其左走向走滑与正滑动相加可达2 m。该滑移主要是左走向走滑，与该地区主要的东西—北—东北—西北—西北正断层不同。