Cosmic Ray Effects Caused by Great Disturbances of the Interplanetary Medium in 1990-1996

The density variation and 3D anisotropy of 10 GV cosmic ray (CR) for every hour during the 1990-1996 years were inferred from the data of world neutron monitor network (about 40 ground-level stations). The global survey method applied to the neutron monitor data allows to discriminate CR effects even of the small magnitude (<0.5%) with sufficient accuracy. Thus, around 1000 transient effects in CR, caused mainly by CME coming to the Earth, were detected in 1990-1996. It is shown, that a number of small (<2%) effects doesn’t decrease along of the solar activity descent, and, despite of the small density variations significant changing of anisotropy can follow these effects. The special interest is in subject of CR variations of the shape of increasing like a reversed, «positive» Forbush-effect.