Seismological experiment at Strokkur from 2020" is a seismological experiment realized at the most active geyser on Iceland by Eva Eibl (University of Potsdam) in collaboration with Gylfi P. Hersir formerly at ISOR Iceland. The geyser is part of the Haukadalur geothermal area in south Iceland, which contains numerous geothermal anomalies, hot springs, and basins (Walter et al., 2018). Strokkur is a pool geyser and has a silica sinter edifice with a water basin on top, which is about 12m in diameter with a central tube of more than 20m depth. The aim of the seismic experiment is to monitor eruptions of Strokkur geyser from March 2020 using three broadband seismic stations (Nanometrics Trillium Compact 120s). Sensors were buried at distances of 38.8m (GE4, SE), 47.3m (GE3, SW), and 42.5m (GE2, N) from Strokkur center. Within this time period about 1 month of data is missing due to power outages. At any other times at least one station recorded the eruptions. From this dataset, converted to MSEED using Pyrocko, currently a catalogue of 506,131 water fountains was determined and further investigated in Eibl et al. (2025). In addition, Eibl et al. (2025) assessed the effect of the weather on the system including the bubble trap suspected at around 24 m depth by Eibl et al. (2021). Waveform data are available from the GEOFON data centre, under network code 2Z.
This dataset comprises acoustic recordings of eruptive events at Strokkur Geyser, Iceland, collected during a field campaign from August 23–27, 2023. The data were recorded using four Chaparral M-60 UHP2 infrasound microphones with a flat frequency response from 0.05–200 Hz. The microphones were deployed in a semicircular array around the geyser pool, approximately 7.5 meters from its center. The signals were digitized using DiGOS Data-Cube3 digitizers with a sampling rate of 400 Hz, ensuring high-resolution capture of both low-frequency infrasound and high-frequency audio signals. Each recording spans approximately 2 ½ hours per day and is timestamped using GPS for precise temporal accuracy. The data are provided as miniSEED files with applied sensitivity, allowing direct calculation of sound pressure levels in Pascal (Pa). The exact locations for each sensor on each day are given below. The dataset highlights acoustic signals associated with the growth, rupture, and disintegration of the water bulge preceding Strokkur’s eruptions. Distinct features, such as "M-shaped" infrasound waveforms, are evident and provide insight into the dynamic processes driving geyser eruptions. The dataset offers a valuable resource for studying acoustic emissions during geyser activity, providing a high-resolution foundation for research on subsurface processes and fluid dynamics. It also facilitates comparative studies of geophysical signals in geysers and analogous volcanic systems. August 23 (Small array configuration): Recording times: 6:25 – 9:41 UTC (exact start times for each sensor may vary as they were started separately). Sensor C3H: 64.31299, -20.30095 Sensor C3G: 64.31308, -20.30089 Sensor C3F: 64.31311, -20.30064 Sensor C3C: 64.31303, -20.30070 August 24 (Half circle around the geyser, until 8:36 UTC): Recording times: 6:50 – 9:17 UTC (exact start times for each sensor may vary). Sensor C3H: 64.31276, -20.30093 Sensor C3G: 64.31280, -20.30073 Sensor C3F: 64.31273, -20.30066 Sensor C3C: 64.31267, -20.30062 August 24 (After 8:36 UTC, modified configuration): Sensor C3F moved to 64.313203, -20.301558 to record gas bubble sounds near another ground opening. Sensor C3H: 64.31276, -20.30093 Sensor C3G: 64.31280, -20.30073 Sensor C3C: 64.31267, -20.30062 August 25 (Half circle around the geyser): Recording times: 6:56 – 9:20 UTC (exact start times for each sensor may vary). Sensor C3H: 64.31276, -20.30093 Sensor C3G: 64.31280, -20.30073 Sensor C3F: 64.31273, -20.30066 Sensor C3C: 64.31267, -20.30062 August 26: No measurements were taken. August 27 (Line configuration, before 8:01 UTC): Recording times: 6:18 – 9:26 UTC (exact start times for each sensor may vary). Sensor C3H: 64.31276, -20.30072 Sensor C3G: 64.31283, -20.30071 Sensor C3F: 64.31288, -20.30071 Sensor C3C: 64.31292, -20.30062 August 27 (After 8:01 UTC, returned to half circle around the geyser): Sensor C3H: 64.31276, -20.30093 Sensor C3G: 64.31280, -20.30073 Sensor C3F: 64.31273, -20.30066 Sensor C3C: 64.31267, -20.30062
Strokkur is a pool geyser in southwest Iceland that erupts every 3.7 minutes. Eruptions start with a blue water bulge that soon turns white (bulge phase) before the water bubble bursts into a jetting water fountain (jet phase). We measured the bulge rising velocity and height and fountain rising velocity and height using video cameras and drones from GFZ and the accompanying ground motion using seismometers from the University of Potsdam. We publish the derived products from video data and seismic data here.
Geysers are accessible sites of hot pots, springs and pools that regularly erupt. To investigate the frequency and dynamics of water eruptions we setup a local broadband seismic network at Strokkur geyser, Iceland. The experiment was running for 1 year, from June 2017 to June 2018. Four broadband seismic stations (Nanometrics Trillium Compact Posthole 20s) were buried 30-40 cm deep in the ground at a distance of 39 m (G4, SE), 47 m (G3, SW), 43m (G2, N) and 96 m (G1, NE) from the center of the Strokkur pool geyser. Regular visits and 2-month interval battery replacement allowed to power the stations without solar panels, therewith limiting visibility and site impact. From this data we picked a catalog of 73,466 eruptions, that are statistically further evaluated in Eibl et al. (2020), allowing to distinguish 50,135 single eruptions, and over 20,000 multiplet eruptions (i.e. several eruptions in close succession). The mean waiting time after an eruption at Strokkur linearly increased from 3.7 to 16.4 min for single and multiplets, respectively. This data publications releases the catalog of 73,466 eruptions.
Das geologische Modell stellt die Abfolge der geologischen Gesteinsschichten im mittleren Westerzgebirge (umfasst das Gebiet um Thum, Ehrenfriedersdorf, Geyer, Elterlein, Grünhain-Beierfeld) in einem 3 dimensionalen Raum dar. Das 3D Modell gehört zum Teilprojekt ROHSA 3.1 und wurde im Auftrag vom LfULG von der TU Bergakademie Freiberg, Beak Consultant GmBH, dem Helmholtz Institut Freiberg und TIN International erstellt. Das geologische Modell ist ein Grundmodell, welches die Verbreitung der angetroffenen Gesteinsschichten (Ordovizium bis Permokarbon) im Untergrund visualisiert, unter Einbezug von geologischen Störungen. Das Modell wurde als gOcad Modell in der Version 2015/5 erstellt und beinhaltet das 3D Modell von Geyer Süd (erstellt von Tin International AG).
Sea level measurements, temperature and salinity data at Gedser, 54.5667 N, 11.9333 E over one month starting 2006-01-01, including digitized historical datasets.
Sea level measurements, temperature and salinity data at Gedser, 54.5667 N, 11.9333 E over one month starting 2005-12-01, including digitized historical datasets.
Sea level measurements, temperature and salinity data at Gedser, 54.5667 N, 11.9333 E over one month starting 2005-11-01, including digitized historical datasets.
Sea level measurements, temperature and salinity data at Gedser, 54.5667 N, 11.9333 E over one month starting 2005-10-01, including digitized historical datasets.
Sea level measurements, temperature and salinity data at Gedser, 54.5667 N, 11.9333 E over one month starting 2005-09-01, including digitized historical datasets.