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We invert seismic waveforms for the spatial dimensions, duration and stress drop of deep\u2010focus earthquakes (<jats:italic>M<\/jats:italic><jats:sub>w<\/jats:sub>6.7\u20137.7) in the Kuril subduction zone. We find stress drops of \u223c1\u201310\u00a0MPa and rigidity\u2010corrected spatial dimensions and durations similar to crustal earthquakes. Radiated efficiency &gt;1 is observed, suggesting that undershooting is prevalent in deep earthquakes, consistent with laboratory derived weakening mechanisms. Comparisons with subduction models suggest across\u2010slab propagation within regions with temperatures<jats:italic>T<\/jats:italic>\u00a0&lt;\u00a0\u223c\u00a01,000\u00b0C, similar to shallow events. Hence, despite different triggering mechanisms, the same physics seems to control the rupture propagation of both shallow and deep earthquakes.<\/jats:p>","DOI":"10.1029\/2022gl098402","type":"journal-article","created":{"date-parts":[[2022,8,15]],"date-time":"2022-08-15T04:49:56Z","timestamp":1660538996000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Across\u2010Slab Propagation and Low Stress Drops of Deep Earthquakes in the Kuril Subduction Zone"],"prefix":"10.1029","volume":"49","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3743-6428","authenticated-orcid":false,"given":"Alice R.","family":"Turner","sequence":"first","affiliation":[{"name":"Department of Earth Sciences University of Oxford Oxford UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9492-6415","authenticated-orcid":false,"given":"Ana M. G.","family":"Ferreira","sequence":"additional","affiliation":[{"name":"CERIS Instituto Superior T\u00e9cnico Universidade de Lisboa Lisbon Portugal"},{"name":"Department of Earth Sciences University College London London UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3372-123X","authenticated-orcid":false,"given":"Andrea","family":"Berbellini","sequence":"additional","affiliation":[{"name":"Department of Earth Sciences University College London London UK"},{"name":"Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna Bologna Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1704-7468","authenticated-orcid":false,"given":"Nicolas","family":"Brantut","sequence":"additional","affiliation":[{"name":"Department of Earth Sciences University College London London UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7717-5931","authenticated-orcid":false,"given":"Manuele","family":"Faccenda","sequence":"additional","affiliation":[{"name":"Dipartimento di Geoscienze Universit\u00e0 di Padova Padua Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7314-8741","authenticated-orcid":false,"given":"Elodie","family":"Kendall","sequence":"additional","affiliation":[{"name":"GFZ German Research Centre for Geosciences Potsdam Germany"}]}],"member":"13","published-online":{"date-parts":[[2022,8,19]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1029\/2008JB005821"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1029\/1998jb900042"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-246x.1977.tb04187.x"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-246x.1977.tb04188.x"},{"key":"e_1_2_7_6_1","article-title":"The current limits of resolution for surface wave tomography in North America","volume":"81","author":"Bassin C.","year":"2000","journal-title":"EOS Transactions American Geophysical Union"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1029\/2004jb003039"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1126\/sciadv.aaz7692"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1029\/1999jb900384"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1002\/2014jb011824"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1002\/2013jb010926"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1029\/2018jb015932"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-246x.2004.02304.x"},{"key":"e_1_2_7_14_1","doi-asserted-by":"publisher","DOI":"10.1785\/0220150283"},{"key":"e_1_2_7_15_1","doi-asserted-by":"publisher","DOI":"10.1038\/18202"},{"key":"e_1_2_7_16_1","first-page":"1180","article-title":"Dependence of the brittle ductile transition on strain\u2010rate\u2010dependent critical homologous temperature","volume":"209","author":"Davis P. 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