The 2020 M>7.5 Shumagin, Alaska, Earthquake Doublet
Subduction earthquakes controlled by incoming plate geometry: The 2020 M>7.5 Shumagin, Alaska, earthquake doublet Yu Jianga, Pablo J. Gonzáleza,b, Roland Bürgmannc aCOMET, Department of Earth, Ocean and Ecological Sciences, School of Environmental Sciences, University of Liverpool, Liverpool, L69 3BX, United Kingdom, Yu.Jiang@liverpoolac.uk bVolcanology Research Group, Department of Life and Earth Sciences, Instituto de Productos Naturales y Agrobiologıa (IPNA-CSIC), 38206 La Laguna, Tenerife, Canary Islands, Spain, pabloj.gonzalez@csic.es cDepartment of Earth and Planetary Science, University of California, Berkeley, CA, USA, burgmann@seismo.berkeley.edu This manuscript is a preprint and has been submitted for publication in Earth and Planetary Science Letters. Please note that the manuscript is undergoing peer review and has not been accepted for publication. Subsequent versions of this manuscript may have slightly different content. If accepted, the final version of this manuscript will be available via the Peer-reviewed Publication DOI link on the right-hand side of this webpage. Please feel free to contact the corresponding author; we welcome feedback. Subduction earthquakes controlled by incoming plate geometry: The 2020 M>7.5 Shumagin, Alaska, earthquake doublet Yu Jianga, Pablo J. Gonz´aleza,b, Roland B¨urgmannc aCOMET, Department of Earth, Ocean and Ecological Sciences, School of Environmental Sciences, University of Liverpool, Liverpool, L69 3BX, United Kingdom bDepartment of Life and Earth Sciences, Instituto de Productos Naturales y Agrobiolog´ıa (IPNA-CSIC), 38206 La Laguna, Tenerife, Canary Islands, Spain cDepartment of Earth and Planetary Science, University of California, Berkeley, CA, USA Abstract In 2020, an earthquake doublet, a M7.8 on July 22nd and a M7.6 on Octo- ber 19th, struck the Alaska-Aleutian subduction zone beneath the Shumagin Islands.
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