Did the 1999 earthquake swarm on Gakkel Ridge open a volcanic conduit? A detailed teleseismic data analysis
Abstract In 1999, a seismic swarm of 237 teleseismically recorded events marked a submarine eruption along the Arctic Gakkel Ridge, later on also analyzed by sonar, bathymetric, hydrothermal, and local seismic studies. We relocated the swarm with the global location algorithm HYPOSAT and analyzed th...
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Online Access: | http://hdl.handle.net/2262/42500 https://doi.org/10.1007/s10950-009-9179-6 |
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fttrinitycoll:oai:tara.tcd.ie:2262/42500 2023-05-15T15:11:05+02:00 Did the 1999 earthquake swarm on Gakkel Ridge open a volcanic conduit? A detailed teleseismic data analysis 2010-12-14T16:55:36Z http://hdl.handle.net/2262/42500 https://doi.org/10.1007/s10950-009-9179-6 en eng Springer Netherlands Dordrecht 1383-4649 (pISSN) 1573-157X (eISSN) 10950 (JournalID) 13834649 (ISSN) s10950-009-9179-6 (publisherID) 9179 (ArticleID) http://hdl.handle.net/2262/42500 Journal of Seismology 14 3 505 522 doi:10.1007/s10950-009-9179-6 Springer Science+Business Media B.V., 2009 12 months Gakkel Ridge HYPOSAT Relocation Station residuals Spatiotemporal organization 1999 swarm Polar research Double difference Cross-correlation Magma ascent Oden volcano Ultraslow-spreading ridge 2010 fttrinitycoll https://doi.org/10.1007/s10950-009-9179-6 2020-02-16T13:49:31Z Abstract In 1999, a seismic swarm of 237 teleseismically recorded events marked a submarine eruption along the Arctic Gakkel Ridge, later on also analyzed by sonar, bathymetric, hydrothermal, and local seismic studies. We relocated the swarm with the global location algorithm HYPOSAT and analyzed the waveforms of the stations closest to the events by cross-correlation. We find event locations scattered around 85?35? N and 85? E at the southern rift wall and inside the rift valley of the Gakkel Ridge. Waveforms of three highly correlating events indicate a volumetric moment tensor component and highly precise referenced double-difference arrival times lead us to believe that they occur at the same geographical position and mark the conduit located further southeast close to a chain of recently imaged volcanic cones. This result is supported by station residual anomalies in the direction of the potential conduit. Seismicity is focused at the crust?mantle boundary at 16?20 km depth, but ascending toward the potential conduit during the beginning of April 1999, indicating an opening of the vent. carsten.riedel@awi.de (Riedel, Carsten) Alfred-Wegener-Institut fur Polar- und Meeresforschung - Am alten Hafen 26 - 27568 - Bremerhaven - GERMANY (Riedel, Carsten) Alfred-Wegener-Institut fur Polar- und Meeresforschung - Am alten Hafen 26 - 27568 - Bremerhaven - GERMANY (Schlindwein, Vera) GERMANY Registration: 2009-11-03 Received: 2009-02-19 Accepted: 2009-11-02 ePublished: 2009-11-20 Other/Unknown Material Arctic The University of Dublin, Trinity College: TARA (Trinity's Access to Research Archive) Alten ENVELOPE(14.009,14.009,66.969,66.969) Arctic Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) Journal of Seismology 14 3 505 522 |
institution |
Open Polar |
collection |
The University of Dublin, Trinity College: TARA (Trinity's Access to Research Archive) |
op_collection_id |
fttrinitycoll |
language |
English |
topic |
Gakkel Ridge HYPOSAT Relocation Station residuals Spatiotemporal organization 1999 swarm Polar research Double difference Cross-correlation Magma ascent Oden volcano Ultraslow-spreading ridge |
spellingShingle |
Gakkel Ridge HYPOSAT Relocation Station residuals Spatiotemporal organization 1999 swarm Polar research Double difference Cross-correlation Magma ascent Oden volcano Ultraslow-spreading ridge Did the 1999 earthquake swarm on Gakkel Ridge open a volcanic conduit? A detailed teleseismic data analysis |
topic_facet |
Gakkel Ridge HYPOSAT Relocation Station residuals Spatiotemporal organization 1999 swarm Polar research Double difference Cross-correlation Magma ascent Oden volcano Ultraslow-spreading ridge |
description |
Abstract In 1999, a seismic swarm of 237 teleseismically recorded events marked a submarine eruption along the Arctic Gakkel Ridge, later on also analyzed by sonar, bathymetric, hydrothermal, and local seismic studies. We relocated the swarm with the global location algorithm HYPOSAT and analyzed the waveforms of the stations closest to the events by cross-correlation. We find event locations scattered around 85?35? N and 85? E at the southern rift wall and inside the rift valley of the Gakkel Ridge. Waveforms of three highly correlating events indicate a volumetric moment tensor component and highly precise referenced double-difference arrival times lead us to believe that they occur at the same geographical position and mark the conduit located further southeast close to a chain of recently imaged volcanic cones. This result is supported by station residual anomalies in the direction of the potential conduit. Seismicity is focused at the crust?mantle boundary at 16?20 km depth, but ascending toward the potential conduit during the beginning of April 1999, indicating an opening of the vent. carsten.riedel@awi.de (Riedel, Carsten) Alfred-Wegener-Institut fur Polar- und Meeresforschung - Am alten Hafen 26 - 27568 - Bremerhaven - GERMANY (Riedel, Carsten) Alfred-Wegener-Institut fur Polar- und Meeresforschung - Am alten Hafen 26 - 27568 - Bremerhaven - GERMANY (Schlindwein, Vera) GERMANY Registration: 2009-11-03 Received: 2009-02-19 Accepted: 2009-11-02 ePublished: 2009-11-20 |
title |
Did the 1999 earthquake swarm on Gakkel Ridge open a volcanic conduit? A detailed teleseismic data analysis |
title_short |
Did the 1999 earthquake swarm on Gakkel Ridge open a volcanic conduit? A detailed teleseismic data analysis |
title_full |
Did the 1999 earthquake swarm on Gakkel Ridge open a volcanic conduit? A detailed teleseismic data analysis |
title_fullStr |
Did the 1999 earthquake swarm on Gakkel Ridge open a volcanic conduit? A detailed teleseismic data analysis |
title_full_unstemmed |
Did the 1999 earthquake swarm on Gakkel Ridge open a volcanic conduit? A detailed teleseismic data analysis |
title_sort |
did the 1999 earthquake swarm on gakkel ridge open a volcanic conduit? a detailed teleseismic data analysis |
publisher |
Springer Netherlands |
publishDate |
2010 |
url |
http://hdl.handle.net/2262/42500 https://doi.org/10.1007/s10950-009-9179-6 |
long_lat |
ENVELOPE(14.009,14.009,66.969,66.969) ENVELOPE(90.000,90.000,87.000,87.000) |
geographic |
Alten Arctic Gakkel Ridge |
geographic_facet |
Alten Arctic Gakkel Ridge |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
1383-4649 (pISSN) 1573-157X (eISSN) 10950 (JournalID) 13834649 (ISSN) s10950-009-9179-6 (publisherID) 9179 (ArticleID) http://hdl.handle.net/2262/42500 Journal of Seismology 14 3 505 522 doi:10.1007/s10950-009-9179-6 |
op_rights |
Springer Science+Business Media B.V., 2009 12 months |
op_doi |
https://doi.org/10.1007/s10950-009-9179-6 |
container_title |
Journal of Seismology |
container_volume |
14 |
container_issue |
3 |
container_start_page |
505 |
op_container_end_page |
522 |
_version_ |
1766341988263657472 |