Before he died, Timo Niroma noted that the two day lull in the solar wind in 1999 coincided with the perihelion of Jupiter, the planet’s closest approach to the Sun in it’s 11.86 year orbit.
http://science.nasa.gov/science-news/science-at-nasa/1999/ast13dec99_1/
Starting late on May 10 and continuing through the early hours of May 12, NASA’s ACE and Wind spacecraft each observed that the density of the solar wind dropped by more than 98%…According to observations from the ACE spacecraft, the density of helium in the solar wind dropped to less than 0.1% of its normal value, and heavier ions, held back by the Sun’s gravity, apparently could not escape from the Sun at all. Data from NASA’s SAMPEX spacecraft reveal that in the wake of this event, Earth’s outer electron radiation belts dissipated and were severely depleted for several months afterward… Earth’s magnetosphere swelled to five to six times its normal size. NASA’s Wind, IMP-8, and Lunar Prospector spacecraft, the Russian INTERBALL satellite and the Japanese Geotail satellite observed the most distant bow shock ever recorded by satellites.







