Solar activity was high. Region 691 (N14W25) grew quickly at the end of yesterday, and emerging flux near the leader spot fueled an instability that resulted in major flares. Chronologically, Region 691 produced: a C9/Sf with type II sweep at 0049UTC, an M3/Sf with type II at 0333UTC, an M4/Sf TENFLARE with types II and IV sweep at 0618UTC, an M3/1n with type II at 0928UTC, an X1/Sf (partially obscured by clouds) TENFLARE with types II and IV sweep at 1146UTC, and most recently an M5/Sn TENFLARE with type II sweep at 1633UTC. Numerous large (i.e., 9500 sfu at 245 MHz at 1413UTC) radio bursts occurred throughout the period. A paucity of LASCO observations made it difficult to discern if associated CMEs occurred, but there seems to be an indication that at least some CME activity did occur in conjunction with the latter flares. The region seems to still retain an amount of potency making additional significant activity likely. Elsewhere, Region 687 (N12W66) and Region 693 (S16E34) each had an occasional small C-class flare as both regions seemed to decay. New Region 695 (S16E68) was numbered.

Solar activity is expected to be moderate to high. Region 691 is still capable of producing M and X class flares.

The geomagnetic field was quiet to mildly active. Alfven waves in the solar wind coupled with a slow increase in the radial speed caused intervals of active conditions. The greater than 10 MeV proton flux at geosynchronous orbit became enhanced around 0700UTC, in response to earlier activity in Region 691. The flux has hovered near 1 pfu for the past 16 hours.

The geomagnetic field is expected to be generally unsettled for the next 36 hours. Activity is expected to increase near midday on 01 November when effects of shocks and CMEs are due, bringing active to periodic major storming over the final 36 hours of the period. The greater than 10 MeV proton flux may exceed event level if Region 691 produces more M and X level activity. The region is in a well-connected location so this proton increase would be abrupt should it occur.

  Observé       30 Oct 136
  Prévisionnel   31 Oct-02 Nov  135/135/130
  Moyenne des 90 derniers jours        30 Oct 106

  Observé Afr/Ap 29 Oct  006/007
  Estimé     Afr/Ap 30 Oct  012/015
  Prévisionnel    Afr/Ap 31 Oct-02 Nov  010/010-015/025-020/030