Solar wind pressure pulses - last update: 20 September 1998, 2030 UT (RR)

The solar wind pressure variations are associated either with tangential discontinuities or interplanetary shocks, which are intrinsic to the solar wind, or with foreshock pressure pulses generated at the bow shock (Korotova and Sibeck, 1994). The pressure pulses have an important role in the solar wind - magnetosphere - ionosphere coupling. They

The ground-based signatures of the pressure pulses are divided into two groups:
  1. low-latitude magnetometers record sudden impulse/sudden storm commencement (SI/SSC) signatures as simple step function increases (or decreases) in the H component.
  2. high-latitude magnetometers record bipolar signatures in the H component (traveling convection vortices)


See also: