The geologic analysis of lunar tectonic and co‐existing mass wasting features provides important insights into seismicity, seismic ground motion, and the seismic risk of the landed missions. Hence, we performed a detailed geologic mapping of tectonic features and co‐seismic boulder avalanches present at the 930‐km‐diameter lunar Orientale basin. We traced 6869 boulder falls at 141 sites along the basin rings, impact crater walls, and volcanic features. The boulder fields also occur on the graben walls and wrinkle ridges. The boulder trail length and width, and slopes of trail and source region of fallen boulders provide insights into formation processes and transport dynamics. Tens of sites have anomalously larger number of boulder falls and trail density. The cumulative size‐frequency distributions of superimposed impact craters present on the boulder trails provided their model formation ages varying between present and 7.5 Ma with at least eight formation episodes, suggesting the timings of seismic activities along the Cordillera and Outer Rook Rings. Many boulder falls are devoid of superimposed impact craters suggesting their recent origins, including some possibly triggered by the 1972 (M_W 2.7) shallow moonquake that occurred near the Cordillera Ring. The formation rates of shallow moonquakes and impact craters along with the seismic ground motion simulations suggest that shallow moonquakes are more dominant sources of ground shaking for triggering the boulder falls in the last 30 million years. Therefore, the Orientale basin has been seismically active for long time and it may be seismically hazardous locally for the future landed missions.

中文翻译：

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东方月球盆地的长期地震和近期地震：来自巨石雪崩，构造和地震地震动的形态学和形成年龄的证据

对月球构造和共存的地物消散特征的地质分析为深入了解地震活动性，地震动和登陆任务的地震风险提供了重要的见识。因此，我们对直径930公里的东方月球盆地的构造特征和同震巨石雪崩进行了详细的地质测绘。我们在沿盆地环，撞击坑壁和火山岩特征的141个地点追踪了6869个巨石瀑布。抱石场也出现在grab壁和皱纹脊上。巨石径的长度和宽度，以及下降的巨石的径迹和源区的斜率提供了对形成过程和输运动力学的了解。数十个地点的巨石落和径迹密度异常大。巨石径迹上存在的叠加撞击坑的累积大小-频率分布提供了它们的模型形成年龄在当前和7.5 Ma之间变化，至少有8个形成事件，这表明了沿着山脉和外钩环地震活动的时间。许多巨石瀑布没有重叠的撞击坑，表明火山口是最近的起源，包括一些可能是由1972年触发的（M_W 2.7）在科迪勒拉环附近发生的浅地震。浅层地震和撞击坑的形成率以及地震地震动模拟表明，在过去的三千万年中，浅层地震是引发巨石倒塌的更主要的地震动来源。因此，Orientale盆地长期以来一直处于地震活跃状态，对于将来的登陆任务而言，可能在局部地区具有地震危险。