Event catalogs of seismic events accompanying the 30 September to 5 October 2015 Skaftá flood
Abstract Two subglacial lakes in the western part of Vatnajökull ice cap, southeastern Iceland, 10 and 15 km WNW of Grímsvötn volcano, are the source of regular jökulhlaups in the Skaftá river. The eastern cauldron featured a jökulhlaup that started on 30 September 2015. The seismic signals generate...
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2023
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ftgfzpotsdamdata:oai:doidb.wdc-terra.org:7799 2023-11-05T03:42:35+01:00 Event catalogs of seismic events accompanying the 30 September to 5 October 2015 Skaftá flood Eibl, Eva P. S. Vogförd, Kristín Dietrich, Thoralf Heimann, Sebastian Bean, Christopher Eibl, Eva P. S. Vogförd, Kristín Dietrich, Thoralf Heimann, Sebastian Bean, Christopher Location of the two subglacial lakes in the western part of Vatnajökull ice cap -17.39 -17.759 64.376 64.536 2023 https://doi.org/10.5880/fidgeo.2023.023 unknown GFZ Data Services doi:10.1038/s41467-020-15744-5 doi:10.5194/esurf-11-933-2023 http://dx.doi.org/10.5880/fidgeo.2023.023 doi:10.5880/fidgeo.2023.023 CC BY 4.0 http://creativecommons.org/licenses/by/4.0/ Iceland seismology EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES > EARTHQUAKE OCCURRENCES EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY Dataset 2023 ftgfzpotsdamdata https://doi.org/10.5880/fidgeo.2023.02310.1038/s41467-020-15744-510.5194/esurf-11-933-2023 2023-10-08T23:44:09Z Abstract Two subglacial lakes in the western part of Vatnajökull ice cap, southeastern Iceland, 10 and 15 km WNW of Grímsvötn volcano, are the source of regular jökulhlaups in the Skaftá river. The eastern cauldron featured a jökulhlaup that started on 30 September 2015. The seismic signals generated by the flood were recorded using two seismic arrays (clusters of seismometers) operated by the Dublin Institute for Advanced Studies (DIAS) and the Icelandic Meteorological Office’s national seismic network, SIL. The arrays were maintained outside Vatnajökull ice cap. In the Vatnajökull region, the SIL network consists of stations that are partly installed on nunataks and within the ice. We performed array-processing in the frequency domain (FK-analysis) on data filtered 1.2 to 2.6 Hz using the array-processing code as implemented in Obspy to derive back azimuth and slownesses of a tremor source propagating with the flood front. We perform beam stacking in the time domain on data filtered from 5 to 20 Hz to derive the back-azimuth of high-frequency transients moving with the flood front. We used the SIL network for location and magnitude determination of 45 events near the cauldron and the flood path. These are possibly 22 icequakes and 23 earthquakes. We used the array data to apply an STA/LTA filter and template matching approach on data filtered from 1 to 15 Hz to detect 669 events associated with the flood. 30% of these could be clustered into families and are likely due to the ice-shelf collapse once the subglacial lake drained. These catalogs are further discussed and evaluated in Eibl et al. 2020 and Eibl et al. 2023. This data publications releases the catalogs of (i) tremor, (ii) located events and (iii) STA/LTA detected and clustered events. Dataset Ice cap Ice Shelf Iceland Vatnajökull GFZ Data Services (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
institution |
Open Polar |
collection |
GFZ Data Services (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdamdata |
language |
unknown |
topic |
Iceland seismology EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES > EARTHQUAKE OCCURRENCES EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY |
spellingShingle |
Iceland seismology EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES > EARTHQUAKE OCCURRENCES EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY Eibl, Eva P. S. Vogförd, Kristín Dietrich, Thoralf Heimann, Sebastian Bean, Christopher Event catalogs of seismic events accompanying the 30 September to 5 October 2015 Skaftá flood |
topic_facet |
Iceland seismology EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES > EARTHQUAKE OCCURRENCES EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY |
description |
Abstract Two subglacial lakes in the western part of Vatnajökull ice cap, southeastern Iceland, 10 and 15 km WNW of Grímsvötn volcano, are the source of regular jökulhlaups in the Skaftá river. The eastern cauldron featured a jökulhlaup that started on 30 September 2015. The seismic signals generated by the flood were recorded using two seismic arrays (clusters of seismometers) operated by the Dublin Institute for Advanced Studies (DIAS) and the Icelandic Meteorological Office’s national seismic network, SIL. The arrays were maintained outside Vatnajökull ice cap. In the Vatnajökull region, the SIL network consists of stations that are partly installed on nunataks and within the ice. We performed array-processing in the frequency domain (FK-analysis) on data filtered 1.2 to 2.6 Hz using the array-processing code as implemented in Obspy to derive back azimuth and slownesses of a tremor source propagating with the flood front. We perform beam stacking in the time domain on data filtered from 5 to 20 Hz to derive the back-azimuth of high-frequency transients moving with the flood front. We used the SIL network for location and magnitude determination of 45 events near the cauldron and the flood path. These are possibly 22 icequakes and 23 earthquakes. We used the array data to apply an STA/LTA filter and template matching approach on data filtered from 1 to 15 Hz to detect 669 events associated with the flood. 30% of these could be clustered into families and are likely due to the ice-shelf collapse once the subglacial lake drained. These catalogs are further discussed and evaluated in Eibl et al. 2020 and Eibl et al. 2023. This data publications releases the catalogs of (i) tremor, (ii) located events and (iii) STA/LTA detected and clustered events. |
author2 |
Eibl, Eva P. S. Vogförd, Kristín Dietrich, Thoralf Heimann, Sebastian Bean, Christopher |
format |
Dataset |
author |
Eibl, Eva P. S. Vogförd, Kristín Dietrich, Thoralf Heimann, Sebastian Bean, Christopher |
author_facet |
Eibl, Eva P. S. Vogförd, Kristín Dietrich, Thoralf Heimann, Sebastian Bean, Christopher |
author_sort |
Eibl, Eva P. S. |
title |
Event catalogs of seismic events accompanying the 30 September to 5 October 2015 Skaftá flood |
title_short |
Event catalogs of seismic events accompanying the 30 September to 5 October 2015 Skaftá flood |
title_full |
Event catalogs of seismic events accompanying the 30 September to 5 October 2015 Skaftá flood |
title_fullStr |
Event catalogs of seismic events accompanying the 30 September to 5 October 2015 Skaftá flood |
title_full_unstemmed |
Event catalogs of seismic events accompanying the 30 September to 5 October 2015 Skaftá flood |
title_sort |
event catalogs of seismic events accompanying the 30 september to 5 october 2015 skaftá flood |
publisher |
GFZ Data Services |
publishDate |
2023 |
url |
https://doi.org/10.5880/fidgeo.2023.023 |
op_coverage |
Location of the two subglacial lakes in the western part of Vatnajökull ice cap -17.39 -17.759 64.376 64.536 |
genre |
Ice cap Ice Shelf Iceland Vatnajökull |
genre_facet |
Ice cap Ice Shelf Iceland Vatnajökull |
op_relation |
doi:10.1038/s41467-020-15744-5 doi:10.5194/esurf-11-933-2023 http://dx.doi.org/10.5880/fidgeo.2023.023 doi:10.5880/fidgeo.2023.023 |
op_rights |
CC BY 4.0 http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.5880/fidgeo.2023.02310.1038/s41467-020-15744-510.5194/esurf-11-933-2023 |
_version_ |
1781699847433224192 |