Ocean-bottom and surface seismometers reveal continuous glacial tremor and slip
Shearing along subduction zones, laboratory experiments on analogue faults, and sliding along glacier beds are all associated with aseismic and co-seismic slip. In this study, an ocean-bottom seismometer is deployed near the terminus of a Greenlandic tidewater glacier, effectively insulating the sig...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/82501 2023-05-15T16:31:11+02:00 Ocean-bottom and surface seismometers reveal continuous glacial tremor and slip Podolskiy, Evgeny A. Murai, Yoshio Kanna, Naoya Sugiyama, Shin http://hdl.handle.net/2115/82501 https://doi.org/10.1038/s41467-021-24142-4 eng eng Nature Research http://hdl.handle.net/2115/82501 Nature communications, 12(1): 3929 http://dx.doi.org/10.1038/s41467-021-24142-4 450 article fthokunivhus https://doi.org/10.1038/s41467-021-24142-4 2022-11-18T01:06:36Z Shearing along subduction zones, laboratory experiments on analogue faults, and sliding along glacier beds are all associated with aseismic and co-seismic slip. In this study, an ocean-bottom seismometer is deployed near the terminus of a Greenlandic tidewater glacier, effectively insulating the signal from the extremely noisy surface seismic wavefield. Continuous, tide-modulated tremor related to ice speed is recorded at the bed of the glacier. When noise interference (for example, due to strong winds) is low, the tremor is also confirmed via analysis of seismic waveforms from surface stations. The signal resembles the tectonic tremor commonly observed during slow-earthquake events in subduction zones. We propose that the glacier sliding velocity can be retrieved from the observed seismic noise. Our approach may open new opportunities for monitoring calving-front processes in one of the most difficult-to-access cryospheric environments. Anomalously slow earthquakes play a critical role in the earthquake cycle and fault sliding. Here, the authors detect continuous seismic radiation from a glacier sliding over its bed and show persistent coastal shaking to represent an addition to the family of slow earthquakes. Article in Journal/Newspaper greenlandic Tidewater Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Nature Communications 12 1 |
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Open Polar |
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Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
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fthokunivhus |
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English |
topic |
450 |
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450 Podolskiy, Evgeny A. Murai, Yoshio Kanna, Naoya Sugiyama, Shin Ocean-bottom and surface seismometers reveal continuous glacial tremor and slip |
topic_facet |
450 |
description |
Shearing along subduction zones, laboratory experiments on analogue faults, and sliding along glacier beds are all associated with aseismic and co-seismic slip. In this study, an ocean-bottom seismometer is deployed near the terminus of a Greenlandic tidewater glacier, effectively insulating the signal from the extremely noisy surface seismic wavefield. Continuous, tide-modulated tremor related to ice speed is recorded at the bed of the glacier. When noise interference (for example, due to strong winds) is low, the tremor is also confirmed via analysis of seismic waveforms from surface stations. The signal resembles the tectonic tremor commonly observed during slow-earthquake events in subduction zones. We propose that the glacier sliding velocity can be retrieved from the observed seismic noise. Our approach may open new opportunities for monitoring calving-front processes in one of the most difficult-to-access cryospheric environments. Anomalously slow earthquakes play a critical role in the earthquake cycle and fault sliding. Here, the authors detect continuous seismic radiation from a glacier sliding over its bed and show persistent coastal shaking to represent an addition to the family of slow earthquakes. |
format |
Article in Journal/Newspaper |
author |
Podolskiy, Evgeny A. Murai, Yoshio Kanna, Naoya Sugiyama, Shin |
author_facet |
Podolskiy, Evgeny A. Murai, Yoshio Kanna, Naoya Sugiyama, Shin |
author_sort |
Podolskiy, Evgeny A. |
title |
Ocean-bottom and surface seismometers reveal continuous glacial tremor and slip |
title_short |
Ocean-bottom and surface seismometers reveal continuous glacial tremor and slip |
title_full |
Ocean-bottom and surface seismometers reveal continuous glacial tremor and slip |
title_fullStr |
Ocean-bottom and surface seismometers reveal continuous glacial tremor and slip |
title_full_unstemmed |
Ocean-bottom and surface seismometers reveal continuous glacial tremor and slip |
title_sort |
ocean-bottom and surface seismometers reveal continuous glacial tremor and slip |
publisher |
Nature Research |
url |
http://hdl.handle.net/2115/82501 https://doi.org/10.1038/s41467-021-24142-4 |
genre |
greenlandic Tidewater |
genre_facet |
greenlandic Tidewater |
op_relation |
http://hdl.handle.net/2115/82501 Nature communications, 12(1): 3929 http://dx.doi.org/10.1038/s41467-021-24142-4 |
op_doi |
https://doi.org/10.1038/s41467-021-24142-4 |
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Nature Communications |
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12 |
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1 |
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1766020951709843456 |