The global Pc 5 event of 14-15 November 1979

Large amplitude Pc-5 waves with 7-8 minute quasi-periodic variations were observed almost continuously for the forty-eight hours of November 14-15, 1979 by several spacecraft in or near geostationary orbit on the day-side portions of their orbits. The waves were observed as large modulations in both the electron and ion fluxes over a wide range of energies (approximately 1 to 500 keV) by the spacecraft 1976-059, 1977-007, 1979-053, P78-2, and GEOS-2 and as magnetic field peak-to-peak modulations of 15-25 gamma by the P78-2 and GOES-2 and -3 magnetometers. The remarkably long persistence of these waves contrasts substantially with observations of typical flux modulation events which usually last less than one hour and which typically show little modulation of the greater or less than 150 keV proton fluxes.