The InSight (Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) mission landed in Elysium Planitia on Mars on 26 November 2018 and fully deployed its seismometer by the end of February 2019. The mission aims to detect, characterize and locate seismic activity on Mars, and to further constrain the internal structure, composition and dynamics of the planet. Here, we present seismometer data recorded until 30 September 2019, which reveal that Mars is seismically active. We identify 174 marsquakes, comprising two distinct populations: 150 small-magnitude, high-frequency events with waves propagating at crustal depths and 24 low-frequency, subcrustal events of magnitude M_w 3–4 with waves propagating at various depths in the mantle. These marsquakes have spectral characteristics similar to the seismicity observed on the Earth and Moon. We determine that two of the largest detected marsquakes were located near the Cerberus Fossae fracture system. From the recorded seismicity, we constrain attenuation in the crust and mantle, and find indications of a potential low-S-wave-velocity layer in the upper mantle.

InSight（利用地震调查，大地测量学和热学进行的内部勘探）任务于2018年11月26日登陆火星极乐世界，并于2019年2月底全面部署了地震仪。该任务旨在探测，表征和定位火星上的地震活动，并进一步限制行星的内部结构，组成和动力学。在这里，我们提供了记录到2019年9月30日的地震仪数据，这表明火星具有地震活动性。我们确定了174个地震，包括两个不同的种群：150个小震级，高频事件，波在地壳深度传播，以及24个震级为M _w的低频，亚地壳事件。3–4波在地幔中的不同深度传播。这些地震的频谱特征类似于在地球和月球上观察到的地震活动。我们确定发现的两个最大的地震位于Cerberus Fossae断裂系统附近。根据记录的地震活动性，我们限制了地壳和地幔的衰减，并发现了上地幔中潜在的低S波速度层的迹象。