We describe the interplanetary phenomena (energetic particles, solar wind plasma, and magnetic field) seen at IMP 8 and at ICE, located 65¿ west of IMP 8, during the period October 19--31, 1989, when neutron monitors observed three ground level events originating in one active region when it was in the longitude range E09¿ to W57¿. At least four shocks, associated with energetic particle enhancements, which can be attributed to a sequence of coronal mass ejections from the the same active region, were seen at both spacecraft. An additional shock was observed only at ICE late in this period when the active region was behind the west limb. Considering all the data (which unfortunately suffer from large gaps), it appears that the ejecta associated with the shocks were detected only when the spacecraft and solar source longitude were separated by less than 50¿. The shocks extended over a greater range of longitudes. The cosmic ray record at Earth is consistent with this picture such that only the first two shock-associated cosmic ray decreases had the signature expected for intercepting ejecta material. This same time period was also examined by Bavassano et al. (1994). However, we do not agree with their conclusion that ''magnetic clouds'' extending at least 75¿ from the source longitude were present. ¿ American Geophysical Union 1995 |