Loading ...
Sorry, an error occurred while loading the content.

Solar Activity Report for 5/20/02

Expand Messages
  • b1blancer_29501
    The geomagnetic storm of this past weekend waxed and waned for 12 hours before it finally died out. The result was some impressive and beautiful aurora. See
    Message 1 of 1 , May 20, 2002
    View Source
    • 0 Attachment
      The geomagnetic storm of this past weekend waxed and waned for 12
      hours before it finally died out. The result was some impressive and
      beautiful aurora. See this link for some gorgeous aurora pictures
      taken in Minnesota : http://gomail.cjb.net/aurora/pics0519.html . The
      past 24 hours have been dominated by 3 strong flares, one of them
      being a major event X-class flare. That flare shot off a CME, but it
      was not Earth directed. Ironically, these big flares did not come
      from the largest sunspot region, that being 9957. Instead, they came
      from relative compact but magnetically intense sunspot region 9961,
      which has recently rotated over the eastern limb of the solar disk.
      9961, along with 9957, could fire off another major flare at any time.
      As these sunspots rotate into an Earth-pointing position, any
      additional activity they might produce will be more likely to affect
      us. A coronal hole is just to the west of sunspot region 9961. It is
      rotating closer to an Earth-pointing position, and we could see some
      high-speed solar wind gusts from it by the end of the week. Finally,
      a relatively small C-class flare near the southwestern limb of the
      solar disk created what looks to be a partial-halo CME. We could
      receive a glancing blow from it in two or three days.

      The current solar and geomagnetic conditions are :

      NOAA sunspot number : 171
      SFI : 171
      A index : 12
      K index : 3

      Solar wind speed : 420.5 km/sec
      Solar wind density : 3.5 protons/cc
      Solar wind pressure : 0.8 nPa

      IMF : 7.5 nT
      IMF Orientation : 3.7 nT South

      Conditions for the last 24 hours :
      Space weather for the past 24 hours has been strong. Radio blackouts
      reaching the R3 level occurred.

      Forecast for the next 24 hours :
      Space weather for the next 24 hours is expected to be minor. Radio
      blackouts reaching the R1 level are expected.

      Solar activity forecast :
      Solar activity is expected to be mostly moderate, but there is a
      chance for an additional major flare event from either of Region 9961
      or 9957.

      Geomagnetic activity forecast :
      The geomagnetic field should be mostly unsettled tomorrow and quiet to
      unsettled on the second day. Activity on the third day is expected
      increase slightly to unsettled with some isolated active periods due
      to possible effects from today's partial halo CME that began at
      19/2026 UTC.

      Recent significant solar flare activity :
      20-May-2002 1527Z X2.1
      20-May-2002 1053Z M5.0
      20-May-2002 1029Z M4.7
    Your message has been successfully submitted and would be delivered to recipients shortly.