Earthquake rupture below the brittle-ductile transition in continental lithospheric mantle
Earthquakes deep in the continental lithosphere are rare and hard to interpret in our current understanding of temperature control on brittle failure. The recent lithospheric mantle earthquake with a moment magnitude of 4.8 at a depth of ~75 km in the Wyoming Craton was exceptionally well recorded a...
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ftbostonuniv:oai:open.bu.edu:2144/37782 2023-05-15T18:19:10+02:00 Earthquake rupture below the brittle-ductile transition in continental lithospheric mantle Prieto, German A. Froment, Berenice Yu, Chunquan Poli, Piero Abercrombie, Rachel 2017-03-01 6 p. https://hdl.handle.net/2144/37782 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000397044000035&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=6e74115fe3da270499c3d65c9b17d654 https://doi.org/10.1126/sciadv.1602642 English en_US eng AMER ASSOC ADVANCEMENT SCIENCE SCIENCE ADVANCES http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000397044000035&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=6e74115fe3da270499c3d65c9b17d654 German A Prieto, Berenice Froment, Chunquan Yu, Piero Poli, Rachel Abercrombie. 2017. "Earthquake rupture below the brittle-ductile transition in continental lithospheric mantle." SCIENCE ADVANCES, Volume 3, Issue 3, pp. ? - ? (6). https://doi.org/10.1126/sciadv.1602642 2375-2548 https://hdl.handle.net/2144/37782 doi:10.1126/sciadv.1602642 189305 Attribution-NonCommercial 4.0 International http://creativecommons.org/licenses/by-nc/4.0/ CC-BY-NC Science & technology Multidisciplinary sciences Intraplate earthquakes Source parameters Discontinuities Reassessment Inversion Spectra Stress Craton Tibet Continental lithosphere Directivity Earthquake sources Lithosphere Rheology Rupture mechanics Article 2017 ftbostonuniv https://doi.org/10.1126/sciadv.1602642 2022-07-11T12:06:10Z Earthquakes deep in the continental lithosphere are rare and hard to interpret in our current understanding of temperature control on brittle failure. The recent lithospheric mantle earthquake with a moment magnitude of 4.8 at a depth of ~75 km in the Wyoming Craton was exceptionally well recorded and thus enabled us to probe the cause of these unusual earthquakes. On the basis of complete earthquake energy balance estimates using broadband waveforms and temperature estimates using surface heat flow and shear wave velocities, we argue that this earthquake occurred in response to ductile deformation at temperatures above 750°C. The high stress drop, low rupture velocity, and low radiation efficiency are all consistent with a dissipative mechanism. Our results imply that earthquake nucleation in the lithospheric mantle is not exclusively limited to the brittle regime; weakening mechanisms in the ductile regime can allow earthquakes to initiate and propagate. This finding has significant implications for understanding deep earthquake rupture mechanics and rheology of the continental lithosphere. G.A.P. and P.P. was supported by the NSF (grant EAR-1521534). Incorporated Research Institutions for Seismology (IRIS) Data Services were funded through the Seismological Facilities for the Advancement of Geoscience and EarthScope proposal under the NSF cooperative agreement (EAR-1261681). (EAR-1521534 - NSF; EAR-1261681 - Seismological Facilities for the Advancement of Geoscience and EarthScope proposal under the NSF cooperative agreement) Published version Article in Journal/Newspaper Seismological Facilities for the Advancement of Geoscience and EarthScope Boston University: OpenBU Science Advances 3 3 e1602642 |
institution |
Open Polar |
collection |
Boston University: OpenBU |
op_collection_id |
ftbostonuniv |
language |
English |
topic |
Science & technology Multidisciplinary sciences Intraplate earthquakes Source parameters Discontinuities Reassessment Inversion Spectra Stress Craton Tibet Continental lithosphere Directivity Earthquake sources Lithosphere Rheology Rupture mechanics |
spellingShingle |
Science & technology Multidisciplinary sciences Intraplate earthquakes Source parameters Discontinuities Reassessment Inversion Spectra Stress Craton Tibet Continental lithosphere Directivity Earthquake sources Lithosphere Rheology Rupture mechanics Prieto, German A. Froment, Berenice Yu, Chunquan Poli, Piero Abercrombie, Rachel Earthquake rupture below the brittle-ductile transition in continental lithospheric mantle |
topic_facet |
Science & technology Multidisciplinary sciences Intraplate earthquakes Source parameters Discontinuities Reassessment Inversion Spectra Stress Craton Tibet Continental lithosphere Directivity Earthquake sources Lithosphere Rheology Rupture mechanics |
description |
Earthquakes deep in the continental lithosphere are rare and hard to interpret in our current understanding of temperature control on brittle failure. The recent lithospheric mantle earthquake with a moment magnitude of 4.8 at a depth of ~75 km in the Wyoming Craton was exceptionally well recorded and thus enabled us to probe the cause of these unusual earthquakes. On the basis of complete earthquake energy balance estimates using broadband waveforms and temperature estimates using surface heat flow and shear wave velocities, we argue that this earthquake occurred in response to ductile deformation at temperatures above 750°C. The high stress drop, low rupture velocity, and low radiation efficiency are all consistent with a dissipative mechanism. Our results imply that earthquake nucleation in the lithospheric mantle is not exclusively limited to the brittle regime; weakening mechanisms in the ductile regime can allow earthquakes to initiate and propagate. This finding has significant implications for understanding deep earthquake rupture mechanics and rheology of the continental lithosphere. G.A.P. and P.P. was supported by the NSF (grant EAR-1521534). Incorporated Research Institutions for Seismology (IRIS) Data Services were funded through the Seismological Facilities for the Advancement of Geoscience and EarthScope proposal under the NSF cooperative agreement (EAR-1261681). (EAR-1521534 - NSF; EAR-1261681 - Seismological Facilities for the Advancement of Geoscience and EarthScope proposal under the NSF cooperative agreement) Published version |
format |
Article in Journal/Newspaper |
author |
Prieto, German A. Froment, Berenice Yu, Chunquan Poli, Piero Abercrombie, Rachel |
author_facet |
Prieto, German A. Froment, Berenice Yu, Chunquan Poli, Piero Abercrombie, Rachel |
author_sort |
Prieto, German A. |
title |
Earthquake rupture below the brittle-ductile transition in continental lithospheric mantle |
title_short |
Earthquake rupture below the brittle-ductile transition in continental lithospheric mantle |
title_full |
Earthquake rupture below the brittle-ductile transition in continental lithospheric mantle |
title_fullStr |
Earthquake rupture below the brittle-ductile transition in continental lithospheric mantle |
title_full_unstemmed |
Earthquake rupture below the brittle-ductile transition in continental lithospheric mantle |
title_sort |
earthquake rupture below the brittle-ductile transition in continental lithospheric mantle |
publisher |
AMER ASSOC ADVANCEMENT SCIENCE |
publishDate |
2017 |
url |
https://hdl.handle.net/2144/37782 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000397044000035&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=6e74115fe3da270499c3d65c9b17d654 https://doi.org/10.1126/sciadv.1602642 |
genre |
Seismological Facilities for the Advancement of Geoscience and EarthScope |
genre_facet |
Seismological Facilities for the Advancement of Geoscience and EarthScope |
op_relation |
SCIENCE ADVANCES http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000397044000035&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=6e74115fe3da270499c3d65c9b17d654 German A Prieto, Berenice Froment, Chunquan Yu, Piero Poli, Rachel Abercrombie. 2017. "Earthquake rupture below the brittle-ductile transition in continental lithospheric mantle." SCIENCE ADVANCES, Volume 3, Issue 3, pp. ? - ? (6). https://doi.org/10.1126/sciadv.1602642 2375-2548 https://hdl.handle.net/2144/37782 doi:10.1126/sciadv.1602642 189305 |
op_rights |
Attribution-NonCommercial 4.0 International http://creativecommons.org/licenses/by-nc/4.0/ |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1126/sciadv.1602642 |
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