Location of P‐wave microseism sources via back‐projection of large aperture seismic array data Posted on January 1, 2015June 20, 2017 by Paul Roberson Koper, K. D., and R. Burlacu (2015). Location of P‐wave microseism sources via back‐projection of large aperture seismic array data, 26th International Union of Geology and Geophysics General Assembly, Prague, Czech Republic, June 22 ‐ July 2.