Abstract
This project aims to obtain financial support for Dr. Bruce T. Tsurutani, from Jet Propulsion Laboratory - JPL/NASA, for a short term visit (8 days) to the Universidade do Vale do Paraíba (UNIVAP). During this visit a study on the origin, evolution and propagation of magnetic decreases in the interplanetary magnetic field observed by Ulysses spacecraft at the external heliosphere (4-5 AU)…