Electronic supplement to: Measuring rock strain with distributed acoustic sensing (DAS) and cemented patch cables

Supplementary material is provided in a PDF file, which shows time-series examples for all IUs and all earthquakes listed in Table 2. We discuss these signals, their similarity and differences. This is complemented by a discussion of scaling factors potentially affecting the strain amplitude presented by the IUs. For all IUs, a spectral analysis of the background signal in a time window before and after swapping the fiber routes is presented, as well as a waveform example with and without subtraction of the reference coil signal. IU configuration parameters are given in tables. The supplementary text further discusses timing accuracy, the means used to locate the individual channels in the mine, and the accuracy by which this can be done. For the marks SPP1–SPP7 in Fig. 4 their location is given in terms of offset to the IU along the fiber route as well as their UTM coordinates.