🚀 go-pugleaf

>Path: infoac!unido!fauern!ira.uka.de!sol.ctr.columbia.edu!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!ucbvax!dog.ee.lbl.gov!ucsd!news-mail-gateway
>From: oler@HG.ULeth.CA (CARY OLER)
>Newsgroups: rec.radio.amateur.misc
>Subject: MAJOR SOLAR FLARE ALERT #2 - 22 MARCH - HIGH IMPACTS POSSIBLE
>Message-ID: <910323013238.224015c3@HG.ULeth.CA>
>Date: 23 Mar 91 08:32:38 GMT
>Sender: news@ucsd.Edu
>Organization: UCSD Usenet Gateway
>Lines: 59


                        --  MAJOR SOLAR FLARE ALERT  --

                                MARCH 22, 1991
                                   Alert #2

                              Flare Event Summary
                   ** HIGH TERRESTRIAL IMPACT IS POSSIBLE **


                                    --------



MAJOR ENERGETIC EVENT SUMMARY

     A large major X-class flare ripped out of Region 6555 late today.  The
event began at 22:42 UT, peaked at 22:47 UT and ended at 23:10 UT on 22
March.  The flare attained an intense class X9.4/3B rating and was located
at a S26E28.  Radio emissions were very strong in the 245 MHz and 10 cm bands.
The 245 MHz emission hit 260,000 s.f.u..  The 10 cm burst peaked at 36,000
s.f.u..  Moderate intensity Type II and IV sweeps were observed with this
event.  The integrated x-ray flux was fairly high, rated at 0.560 Joules per
meter^2.  A moderate intensity proton event is expected anytime now.  A proton
enhancement has been observed over the past hour.  Solar protons are expected
to peak at levels near 80 p.f.u..  A Polar Cap Absorption (PCA) event is
expected to begin at anytime.  A TOTAL POLAR RADIO SIGNAL BLACKOUT IS EXPECTED
ANYTIME.  The duration of the blackout is expected to be approximately 24 hours.



POTENTIAL TERRESTRIAL IMPACT ASSESSMENT

     Further consultation and analysis will be required before an official
terrestrial impact will be released.  This terrestrial impact forecast will
be issued after 17:00 UT on 23 March.

     Preliminary results suggest that a high probability exists for a MAJOR
middle-latitude geomagnetic storm, beginning sometime on 24 March.  A more
specific time period will be given with the 24 March bulletin (or warning).
This major flare was significant and has the potential of producing large
terrestrial impacts.  More detailed information regarding the predicted state
of the geomagnetic field will be given later today.

     Region 6555 has been magnetically analyzed in greater detail now.
This region sports a beta-gamma-delta magnetic configuration.  The internal
structure is associated with strong fields, high gradients and high shear.
The spots are contorted in an unstable configuration which will most likely
produce further major flaring.

     A POTENTIAL PROTON FLARE WARNING HAS BEEN ISSUED, AS HAS A PROTON
FLARE ALERT associated with this latest major event.  A POLAR RADIO
BLACKOUT WARNING IS IN PROGRESS.  A POTENTIAL PCA ACTIVITY WARNING IS IN
PROGRESS.  The POTENTIAL SATELLITE PROTON EVENT WARNING CONTINUES.

     A magnetic storm warning will likely be issued later this UT day.


**  End of Alert  **
-- 
*****************************************************************
   ___  ____  ___    _  _ ___ ___   ___ ___ ___     ___ _  _
  /__/ / / /   /    /\ / /__   /   /__//__//   /__//__ /\ /
 / \  /   / __/_   /  / /__   /   /  //  //__ /  //__ /  /