Authors: James M. Ryan (UNH), Pierre-Simon Mangeard (UD), V. Bindi (UH(), J. Clem (UD), S. Surujhdeo (UWRF), N. Nikonov (UH), M. Colson (UNH), A. Kuhlman (UNH)

An exceptionally intense Ground Level Enhancement occurred on 2025 November 11, GLE77.  It produced a signal in all the neutron monitors in the Simpson Neutron Monitor network.  The prompt component was well measured in the eastern US stations with a 100% increase at Mount Washington.  Other stations highlighted the later, slower components for several hours.  Even the 13 GV cutoff station on Haleakala Maui exhibited a signal of short duration on the event leading edge.  We attribute the nonuniform network response to a moving particle beam axis registered by stations with differing asymptomatic directions.  A summary of the measurements is presented.