Scaling and spatial complementarity of tectonic earthquake swarms

Handle URI:
http://hdl.handle.net/10754/626167
Title:
Scaling and spatial complementarity of tectonic earthquake swarms
Authors:
Passarelli, Luigi ( 0000-0001-8995-8765 ) ; Rivalta, Eleonora; Jonsson, Sigurjon ( 0000-0001-5378-7079 ) ; Hensch, Martin; Metzger, Sabrina ( 0000-0002-0803-6599 ) ; Jakobsdóttir, Steinunn S.; Maccaferri, Francesco; Corbi, Fabio; Dahm, Torsten
Abstract:
Tectonic earthquake swarms (TES) often coincide with aseismic slip and sometimes precede damaging earthquakes. In spite of recent progress in understanding the significance and properties of TES at plate boundaries, their mechanics and scaling are still largely uncertain. Here we evaluate several TES that occurred during the past 20 years on a transform plate boundary in North Iceland. We show that the swarms complement each other spatially with later swarms discouraged from fault segments activated by earlier swarms, which suggests efficient strain release and aseismic slip. The fault area illuminated by earthquakes during swarms may be more representative of the total moment release than the cumulative moment of the swarm earthquakes. We use these findings and other published results from a variety of tectonic settings to discuss general scaling properties for TES. The results indicate that the importance of TES in releasing tectonic strain at plate boundaries may have been underestimated.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Passarelli L, Rivalta E, Jónsson S, Hensch M, Metzger S, et al. (2018) Scaling and spatial complementarity of tectonic earthquake swarms. Earth and Planetary Science Letters 482: 62–70. Available: http://dx.doi.org/10.1016/j.epsl.2017.10.052.
Publisher:
Elsevier BV
Journal:
Earth and Planetary Science Letters
Issue Date:
10-Nov-2017
DOI:
10.1016/j.epsl.2017.10.052
Type:
Article
ISSN:
0012-821X
Sponsors:
This work received funding from the European Union through ERC Grant N. 240583. We thank Sigrún Hreinsdóttir (GNS Science) for providing the GPS time-series. The stimulating comments of two anonymous reviewers helped to improve the manuscript. Data from one seismometer was kindly provided by R.S. White from a project funded by the UK Natural Environment Research Council (NERC) SEIS-UK (loan 968). Data retrieved in this study are available in the supplementary information. The SIL earthquake catalog is available at www.vedur.is. All figures except for Fig. 7 are drawn using Generic Mapping Tools software (Wessel and Smith, 1998).
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0012821X17306209
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorPassarelli, Luigien
dc.contributor.authorRivalta, Eleonoraen
dc.contributor.authorJonsson, Sigurjonen
dc.contributor.authorHensch, Martinen
dc.contributor.authorMetzger, Sabrinaen
dc.contributor.authorJakobsdóttir, Steinunn S.en
dc.contributor.authorMaccaferri, Francescoen
dc.contributor.authorCorbi, Fabioen
dc.contributor.authorDahm, Torstenen
dc.date.accessioned2017-11-15T11:04:55Z-
dc.date.available2017-11-15T11:04:55Z-
dc.date.issued2017-11-10en
dc.identifier.citationPassarelli L, Rivalta E, Jónsson S, Hensch M, Metzger S, et al. (2018) Scaling and spatial complementarity of tectonic earthquake swarms. Earth and Planetary Science Letters 482: 62–70. Available: http://dx.doi.org/10.1016/j.epsl.2017.10.052.en
dc.identifier.issn0012-821Xen
dc.identifier.doi10.1016/j.epsl.2017.10.052en
dc.identifier.urihttp://hdl.handle.net/10754/626167-
dc.description.abstractTectonic earthquake swarms (TES) often coincide with aseismic slip and sometimes precede damaging earthquakes. In spite of recent progress in understanding the significance and properties of TES at plate boundaries, their mechanics and scaling are still largely uncertain. Here we evaluate several TES that occurred during the past 20 years on a transform plate boundary in North Iceland. We show that the swarms complement each other spatially with later swarms discouraged from fault segments activated by earlier swarms, which suggests efficient strain release and aseismic slip. The fault area illuminated by earthquakes during swarms may be more representative of the total moment release than the cumulative moment of the swarm earthquakes. We use these findings and other published results from a variety of tectonic settings to discuss general scaling properties for TES. The results indicate that the importance of TES in releasing tectonic strain at plate boundaries may have been underestimated.en
dc.description.sponsorshipThis work received funding from the European Union through ERC Grant N. 240583. We thank Sigrún Hreinsdóttir (GNS Science) for providing the GPS time-series. The stimulating comments of two anonymous reviewers helped to improve the manuscript. Data from one seismometer was kindly provided by R.S. White from a project funded by the UK Natural Environment Research Council (NERC) SEIS-UK (loan 968). Data retrieved in this study are available in the supplementary information. The SIL earthquake catalog is available at www.vedur.is. All figures except for Fig. 7 are drawn using Generic Mapping Tools software (Wessel and Smith, 1998).en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0012821X17306209en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Earth and Planetary Science Letters. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Earth and Planetary Science Letters, [, , (2017-11-10)] DOI: 10.1016/j.epsl.2017.10.052 . © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectTectonic Earthquake Swarms (TES)en
dc.subjectmoment, duration and migration velocity scalings of TESen
dc.subjectefficient tectonic strain release by TESen
dc.subjectaseismic/seismic source mechanisms for TESen
dc.subjecttriggering mechanisms of TESen
dc.subjectridge transform fault earthquakesen
dc.titleScaling and spatial complementarity of tectonic earthquake swarmsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalEarth and Planetary Science Lettersen
dc.eprint.versionPost-printen
dc.contributor.institutionGFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germanyen
dc.contributor.institutionIcelandic Meteorological Office, Bústaðavegi 7-9, 108 Reykjavík, Icelanden
dc.contributor.institutionThe Icelandic Centre for Research, Borgartún 30, 105 Reykjavík, Icelanden
dc.contributor.institutionGeosciences Montpellier Laboratory, Montpellier University, CC.60, Place E. Bataillon, 34095 Montpellier cédex 5, Franceen
kaust.authorJonsson, Sigurjonen
kaust.authorJakobsdóttir, Steinunn S.en
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