Modelling of earthquake swarms suggests magmatic fluids in the upper crust beneath the Eger Rift

Seismic catalog and moment tensor solutions for the 2023–2024 Klingenthal–Kraslice earthquake swarm, Eger Rift This dataset contains the seismic catalog and source parameters for the Klingenthal–Kraslice earthquake swarm (Eger Rift) used in the publication; Büyükakpınar, P., Dahm, T., Hainzl, S. et al. Modelling of earthquake swarms suggests magmatic fluids in the upper crust beneath the Eger Rift. Commun Earth Environ 7, 6 (2026). https://doi.org/10.1038/s43247-025-03019-0 Dataset Contents catalog.csv: A list of 8,069 detections identified via the QSEEK framework. moment_tensor_catalog_pyrocko.yaml: Waveform-based centroid moment tensor (CMT) solutions for 64 events (Mw>1.2), processed using the Grond inversion framework. events.tar.xz: A compressed archive containing raw waveform data (MiniSEED), phase markers, and event metadata for the 64 moment tensor events. Data Structure The waveform data in events.tar.xz is organized as follows: events/└── [Timestamp]/ # e.g., 20240321T204509 ├── event.txt # Pyrocko event metadata ├── markers.txt # Phase pick information └── waveforms/ └── raw/ # .mseed traces Moment Tensor Catalog This moment tensor catalog moment_tensor_catalog_pyrocko.yaml contains waveform-based deviatoric centroid moment tensor solutions for 64 events with Mw > 1.2 from the Klingenthal–Kraslice earthquake swarm. The events were computed using Grond (Heimann et al., 2018) and are provided in Pyrocko event format (Heimann et al., 2017), including origin time, location, scalar seismic moment, moment tensor components, and focal mechanism parameters. The moment tensor solutions were followed and analyzed according to the methodology of Büyükakpınar et al. (2025) to investigate the source processes of the swarm activity. Full waveform fits are available as online reports and interactive web-based visualizations at: Online CMT reports Seismic Catalog The dataset is distributed as a single CSV file named catalog.csv, containing 8,069 detections identified between 12 December 2023 and 31 May 2024. The seismic waveform data used in this study are available through FDSN data centers under the following network codes: 1D – Long-term monitoring of swarm earthquakes in the western Eger Rifthttps://doi.org/10.14470/6Q705117 (ICDP) TH – Thüringer Seismologisches Netz (TSN)https://doi.org/10.7914/SN/TH (Friedrich Schiller University Jena) SX – SXNET (Saxon Seismic Network)https://doi.org/10.7914/SN/SX (University of Leipzig) BW – BayernNetzhttps://doi.org/10.7914/SN/BW (Bavarian Seismological Network) GQ – German Strong Motion Network(Federal Institute for Geosciences and Natural Resources, BGR) Seismic data from the ICDP-EGER virtual network are archived at GFZ Data Serviceshttps://doi.org/10.14470/SN852091 and are accessible through the FDSN system. The data are provided in CSV format, where each row represents a single detected seismic event. The file header is automatically generated by the QSEEK framework detection module (Isken et al., 2025). Column descriptions time – Origin time of the detected event in UTC (ISO 8601 format)lat – Effective event latitude (WGS84). Calculated from internal east/north shifts relative to the reference point.lon – Effective event longitude (WGS84). Calculated from internal east/north shifts relative to the reference point.depth – Effective event depth in meters (positive downward)east_shift – Eastward horizontal offset from the network’s reference point in metersnorth_shift – Northward horizontal offset from the network’s reference point in metersdistance_border – Distance to the nearest configured network boundary in meters (only NW, SW, and bottom borders considered)WKT_geom – Event hypocenter in Well-Known Text (WKT) geometry format: POINT Z(lon lat depth)semblance – Coherency measure of waveform detections (0–1)azimuthal_coverage – Azimuthal coverage of stations (360° − azimuthal gap)n_stations – Number of stations contributing to the detectionuncertainty_horizontal – Horizontal location uncertainty (meters)uncertainty_vertical – Vertical location uncertainty (meters)ML_webnet_western_bohemia – Local magnitude (Horálek et al., 2000)ML_error_webnet_western_bohemia – Estimated uncertainty of the local magnitude References Büyükakpınar, P., Dahm, T., Hainzl, S. et al. Modelling of earthquake swarms suggests magmatic fluids in the upper crust beneath the Eger Rift. Commun Earth Environ 7, 6 (2026). https://doi.org/10.1038/s43247-025-03019-0 Heimann, Sebastian; Isken, Marius; Kühn, Daniela; Sudhaus, Henriette; Steinberg, Andreas; Daout, Simon; Cesca, Simone; Vasyura-Bathke, Hannes; Dahm, Torsten (2018): Grond - A probabilistic earthquake source inversion framework. V. 1.0. GFZ Data Services. https://doi.org/10.5880/GFZ.2.1.2018.003 Heimann, Sebastian; Kriegerowski, Marius; Isken, Marius; Cesca, Simone; Daout, Simon; Grigoli, Francesco; Juretzek, Carina; Megies, Tobias; Nooshiri, Nima; Steinberg, Andreas; Sudhaus, Henriette; Vasyura-Bathke, Hannes; Willey, Timothy; Dahm, Torsten (2017): Pyrocko - An open-source seismology toolbox and library. V. 0.3. GFZ Data Services. https://doi.org/10.5880/GFZ.2.1.2017.001 Horálek, J., Fischer, T., Boušková, A. et al. The Western Bohemia/Vogtland Region in the Light of the Webnet Network. Studia Geophysica et Geodaetica 44, 107–125 (2000). https://doi.org/10.1023/A:1022198406514 Isken, M., Niemz, P., Münchmeyer, J., Büyükakpınar, P., Heimann, S., Cesca, S., Vasyura-Bathke, H., & Dahm, T. (2025). Qseek: A data-driven Framework for Automated Earthquake Detection, Localization and Characterization. Seismica, 4(1). https://doi.org/10.26443/seismica.v4i1.1283