Eric M Dunham , Amanda Thomas, Thorsten W. Becker , Camilla Cattania, Jessica Cleary Hawthorne, Judith Hubbard, Gabriel C Lotto, Jean-Arthur Olive, John Platt

The Planning for a Modeling Collaboratory for Subduction Zone Science (MCS) Research Coordination Network (RCN) is one of three RCNs funded by the National Science Foundation (NSF) following the 2016 Subduction Zone Observatory (SZO) workshop. The MCS RCN aims to facilitate the development of the integrative earthquake and volcano modeling component of SZ4D, the MCS, and explore how computational approaches and community building can best advance subduction zone systems science. This report documents the excitement and vision of the scientific community as articulated by participants of the October 2019 MCS Megathrust Modeling Workshop, with material from this and prior events available on the MCS RCN web site. This report reflects the efforts of the writing committee and input from the community throughout the summer of 2020.