S U M M A R Y In late June 2016, the Harmalière clayey landslide (located 30 km south of the city of Grenoble, French Alps) was dramatically reactivated at the headscarp after a 35-yr-long period of continuous but limited activity. The total involved volume, which moved as sliding blocks of various sizes, was estimated to be about 2 × 10 6 m3. Two seismometers were installed at the rear of the main headscarp in August 2016, on both sides of a developing fracture delineating a block with a volume of a few hundred cubic metres. For 4 months, they continuously recorded seismic ambient vibrations and microearthquakes until the block broke. Five seismic parameters were derived from the monitoring: the cumulative number of microearthquakes (CNe), the seismic energy (SE), the block resonance frequency (fB), the relative variation in Rayleigh wave velocity (dV/V) deduced from noise cross-correlations between the two sensors and the associated correlation coefficient (CC). All parameters showed a significant precursory signal before the rupture, but at very different times, which indicates the complexity of the rupture mechanism in this clay material.

中文翻译：

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法国西部阿尔卑斯山哈马里埃滑坡中粘土块破裂的地震表征

总结 2016 年 6 月下旬，Harmalière 粘土滑坡（位于法国阿尔卑斯山格勒诺布尔市以南 30 公里处）在经过 35 年的持续但有限的活动后，在顶梁处急剧重新激活。所涉及的总体积，作为各种大小的滑块移动，估计约为 2 × 10 6 m3。两个地震仪于 2016 年 8 月安装在主顶盖的后部，位于一条发育裂缝的两侧，划定了一个体积为几百立方米的块体。在 4 个月的时间里，他们连续记录地震环境振动和微地震，直到块破裂。监测得到五个地震参数：微震累积次数（CNe）、地震能量（SE）、块状共振频率（fB）、从两个传感器之间的噪声互相关和相关的相关系数 (CC) 推导出瑞利波速度 (dV/V) 的相对变化。所有参数在破裂前都显示出显着的前兆信号，但在非常不同的时间，这表明这种粘土材料破裂机制的复杂性。