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

SUN ERUPTS WITH INTENSE ACTIVITY

Expand Messages
  • hurricaneboy13
    http://www.noaanews.noaa.gov/stories2003/s2104.htm Oct. 22, 2003 — Forecasters at the NOAA Space Environment Center in Boulder, Colo., observed two dynamic
    Message 1 of 1 , Oct 24, 2003
    View Source
    • 0 Attachment
      http://www.noaanews.noaa.gov/stories2003/s2104.htm

      Oct. 22, 2003 — Forecasters at the NOAA Space Environment Center in
      Boulder, Colo., observed two dynamic areas of the sun, one of which
      has produced a coronal mass ejection, or CME, Wednesday morning at 3
      a.m. EDT that appears to be Earth-directed. The forecasters are
      predicting a strong geomagnetic storm, G-3 on the NOAA Space Weather
      Scales, that should reach Earth on Friday, October 24. (Click here
      to view larger image from the SOHO spacecraft of the intense solar
      activity on the sun taken Oct. 21, 2003. Click here to view high
      resolution version, which is a large file. Click here to view latest
      images. Please credit "SOHO.")

      NOAA Region 484 developed rapidly over the past three days and is
      now one of the largest sunspot clusters to emerge during Solar Cycle
      23. It is about 10 times larger than the Earth. This region, which
      is nearing the center of the sun, already produced a major flare, R-
      3 on the NOAA Space Weather Scales, producing a radio blackout on
      October 19 at 12:50 p.m EDT. The region continues to grow, and
      additional substantial flare activity is likely.

      Larry Combs, a forecaster with the NOAA Space Environment Center's
      Space Weather Operations, said that this region has developed
      rapidly over the last three to four days. "It's somewhat unusual to
      have this much activity when we're approximately three-and-a-half
      years past solar maximum," he said. "In fact, just last week, solar
      activity was very low with an almost spotless sun." Solar cycles of
      high and low activity repeat about every eleven years, and the sun
      has been moving towards solar minimum for the past three years.

      A second intense active region is rotating on the southeast quadrant
      of the sun. Although the sunspot group is not yet visible, two
      powerful eruptions occurred on October 21 as seen from the LASCO
      instrument on the SOHO spacecraft. These eruptions may herald the
      arrival of another volatile active center with the potential to
      impact various Earth systems.

      Further major eruptions are possible from these active regions as
      they rotate across the face of the sun over the next two weeks.
      Satellite and other spacecraft operations, power systems, high
      frequency communications, and navigation systems may experience
      disruptions over this two-week period.
    Your message has been successfully submitted and would be delivered to recipients shortly.