{"615367":{"#nid":"615367","#data":{"type":"event","title":"Portrait of an Earthquake: Geodetic Perspectives on the Physics of Faulting in the Himalaya","body":[{"value":"\u003Ch4\u003E\u003Cstrong\u003EA School of Earth and Atmospheric Sciences Presents Dr. Eric O. Lindsey, Nanyang Technical University\u003C\/strong\u003E\u003C\/h4\u003E\r\n\r\n\u003Cp\u003EPortrait of an Earthquake: Geodetic Perspectives on the Physics of Faulting in the Himalaya\u003C\/p\u003E\r\n\r\n\u003Cdiv\u003EPlate-boundary faults are massive, complex structures that display a wide range of seismic and aseismic behavior, and understanding the\u0026nbsp;physics that govern their activity requires a highly multidisciplinary\u0026nbsp;approach.\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003EIn this talk, I will use a combination of geodetic, geologic,\u0026nbsp;and numerical results to show how the 3D structure of the Main Himalayan\u0026nbsp;thrust controls its frictional behavior, and offer a new perspective on\u0026nbsp;the interplay between earthquakes and long-term fault evolution.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nFollowing the 2015 Nepal earthquake, I provided the first\u0026nbsp;high-resolution, wide-swath synthetic aperture radar image of the\u0026nbsp;resulting ground deformation to the geophysics community. These data\u0026nbsp;reveal clearly where the fault slipped, and by integrating them with 3D\u0026nbsp;structural models, we show that the earthquake was bounded on all sides\u0026nbsp;by sharp bends or ramps along the fault.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nCombining these results with long-term GPS observations of ground\u0026nbsp;motion, I demonstrate how the fault structure controls both the long-\u0026nbsp;and short-term behavior of the megathrust throughout the Himalaya, and\u0026nbsp;in turn, how fault friction interacts to control the fault structure\u0026nbsp;over time.\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nIn the future, developing a better understanding of the interaction\u0026nbsp;between the structure and behavior of faults will require input from a\u0026nbsp;diverse set of geophysical techniques and disciplines.\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003E\u0026nbsp;\u003C\/div\u003E\r\n\r\n\u003Cdiv\u003EIn addition to mapping ground deformation at high precision with synthetic aperture\u0026nbsp;radar, I will show some promising new ground-based geodetic methods and\u0026nbsp;physics-based numerical tools I have pioneered. Together with seismic\u0026nbsp;and geologic observations, they will enable us to paint a more complete\u0026nbsp;picture of how earthquakes interact with and control the faults they occur on.\u003C\/div\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"A seminar by Dr. Eric O. Lindsey, School of Earth and Atmospheric Sciences"}],"uid":"34458","created_gmt":"2018-12-13 19:34:25","changed_gmt":"2019-02-13 15:23:25","author":"nlawson3","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2019-02-21T11:00:00-05:00","event_time_end":"2019-02-21T11:50:00-05:00","event_time_end_last":"2019-02-21T11:50:00-05:00","gmt_time_start":"2019-02-21 16:00:00","gmt_time_end":"2019-02-21 16:50:00","gmt_time_end_last":"2019-02-21 16:50:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"hg_media":{"615327":{"id":"615327","type":"image","title":"Eric Lindsey","body":null,"created":"1544718830","gmt_created":"2018-12-13 16:33:50","changed":"1550071352","gmt_changed":"2019-02-13 15:22:32","alt":"","file":{"fid":"235146","name":"E. Lindsey.jpg","image_path":"\/sites\/default\/files\/images\/E.%20Lindsey_0.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/images\/E.%20Lindsey_0.jpg","mime":"image\/jpeg","size":40374,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/images\/E.%20Lindsey_0.jpg?itok=iYPGdb6c"}}},"media_ids":["615327"],"groups":[{"id":"364801","name":"School of Earth and Atmospheric Sciences (EAS)"}],"categories":[],"keywords":[{"id":"175623","name":"EAS Seminar"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"177814","name":"Postdoc"},{"id":"174045","name":"Graduate students"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EAndrew Newman\u003C\/p\u003E\r\n","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}