Hidden cascades of seismic ice stream deformation - raw data

We lowered a loose-tube fiber-optic cable, containing four single-mode fibers, 1500 m into the EastGRIP borehole, which, at that time, had reached a depth of 2420 m. For one day, on 9 August 2022, we measured longitudinal strain rate along the cable using a Silixa iDAS v2 interrogator with 10 m gauge length. Thanks to an average borehole inclination of 3 degrees, the cable was frictionally coupled to the borehole wall, thereby providing high-quality recordings of body waves, originating from active-shot experiments. In addition to the these, the DAS cable recorded a large variety of natural englacial seismicity, including small individual events, as well as event cascades that lasted for several seconds. We uploaded raw data that have not been processed.