2026-07-29T09:21:55Zhttp://doidb.wdc-terra.org/oaip/oai

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false4DOIDB.GFZ 10.5880/GFZ.4.2.2022.002 Boese, Carolin M. Carolin M. Boese 0000-0002-2383-2219 GFZ German Research Centre for Geosciences, Potsdam, Germany Kwiatek, Grzegorz Grzegorz Kwiatek 0000-0003-1076-615X GFZ German Research Centre for Geosciences, Potsdam, Germany Fischer, Thomas Thomas Fischer GmuG mbH Bad Nauheim, Bad Nauheim, Germany Plenkers, Katrin Katrin Plenkers 0000-0002-7739-2554 SCCER-SoE ETH Zurich, Zurich, Switzerland Dresen, Georg Georg Dresen 0000-0002-3737-2858 GFZ German Research Centre for Geosciences, Potsdam, Germany GFZ Data Services 2023 Ultrasonic transmission Acoustic emission sensor velocity calibration EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES > SEISMIC PROFILE > SEISMIC BODY WAVES In Situ/Laboratory Instruments > Magnetic/Motion Sensors > Accelerometers > ACCELEROMETERS Boese, Carolin M. Carolin M. Boese 0000-0002-2383-2219 GFZ German Research Centre for Geosciences, Potsdam, Germany Boese, Carolin M. Carolin M. Boese 0000-0002-2383-2219 GFZ German Research Centre for Geosciences, Potsdam, Germany Kwiatek, Grzegorz Grzegorz Kwiatek 0000-0003-1076-615X GFZ German Research Centre for Geosciences, Potsdam, Germany Fischer, Thomas Thomas Fischer GmuG mbH Bad Nauheim, Bad Nauheim, Germany Plenkers, Katrin Katrin Plenkers 0000-0002-7739-2554 SCCER-SoE ETH Zurich, Zurich, Switzerland Plenkers, Katrin Katrin Plenkers 0000-0002-7739-2554 SCCER-SoE ETH Zurich, Zurich, Switzerland Dresen, Georg Georg Dresen 0000-0002-3737-2858 GFZ German Research Centre for Geosciences, Potsdam, Germany Boese, Carolin M. GFZ German Research Centre for Geosciences, Potsdam, Germany Boese, Carolin M. GFZ German Research Centre for Geosciences, Potsdam, Germany 2018-06-29/2019-12-05 Dataset https://www.induced.pl/software/foci 10.5880/GFZ.4.2.2021.002 10.1007/s00603-023-03418-9 CC BY 4.0 In 2020 and 2021 the STIMTEC-X hydraulic stimulation experiment was performed at ca.~130 m below surface at the Reiche Zeche underground research laboratory in Freiberg, Saxony/Germany. The project temporally followed the STIMTEC experiment at the same site and aimed at understanding the stress heterogeneity of the anisotropic and metamorphic gneiss rock mass. The STIMTEC-X experiment applied the hydraulic stimulation technique in several boreholes at the mine-scale. Complementary to the stimulations, there were active seismic ultrasonic transmission data acquired before the stimulations.

We use a seismic monitoring network consisting of six single-component acoustic emission (AE) sensors (sensitivity 1-60 kHz), six hydrophone-like AE sensors (sensitivity 1-40 kHz) and four to twelve single-component Wilcoxon accelerometers (sensitivity 50 Hz-25 kHz). The AE sensors and remained stationary in sub-horizontal and upwards reaching boreholes, the accelerometers were mostly installed along the tunnel walls with one accelerometer in a shallow borehole in each tunnel, and the hydrophone-like AE sensors were installed in the down-going water filled boreholes, but repositioned for each measurement campaign (Figure 1).

This data set of 120 active ultrasonic transmission (UT) measurements is supplementary to Boese et al. (2022, in review), which introduces some of the active measurement campaigns of the STIMTEC-X experiment in detail. The whole data set togetter with the “Ultrasonic transmission measurements from six boreholes from the STIMTEC experiment, Reiche Zeche Mine, Freiberg (Saxony, Germany)” [https://doi.org/10.5880/GFZ.4.2.2021.002] was used to evaluate performance measures such as sensitivity and frequency bandwith, coupling, placement and polarity of the hydrophone-like AE sensor compared to AE sensors. The active seismic data provided here are from seven boreholes (BH01, BH05, BH06, BH10, BH14, BH18, BH19) as shown in Figure 1.

There are nine tables provided as metadata of which seven contain the STIMTEC-X sensor coordinates for each measurement campaign, the event information of all the 120 UT measurements and the UT picks. The UT measurements were recorded with a sampling rate of 1 MHz and results from an automatic stack of 1024 UT pulses generated by the ultrasonic transmitter and recorded by the STIMTEC-X sensors.

The UT measurements are saved in binary file format (fsf file format). Fsf-files can be processed with FOCI software: https://www.induced.pl/software/foci. Each fsf file contains 32768 samples, which corresponds to 0.032768 seconds. All UT event files were manual inspected and phase arrivals identified. These are stored in the fsf-file header as well as in the table STIMTECX_UT_picks.csv.
STIMTEC underground research lab, 2nd floor Reiche Zeche Mine, Freiberg, saxony, Germany 13.3507 13.3513 50.9247 50.9254 Bundesministerium für Bildung und Forschung http://doi.org/10.13039/501100002347 03G0874C Verbundvorhaben STIMTEC Bundesministerium für Bildung und Forschung http://doi.org/10.13039/501100002347 03G0901C Verbundvorhaben STIMTECX