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From: oler@rho.uleth.ca (Cary Oler)
Message-Id: <9306250519.AA04401@rho.uleth.ca>
Subject: ALERT: Major Solar Flare Alert - 25 June
To: solar-warnings@lut.fi
Date: Thu, 24 Jun 93 23:19:34 MDT
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Reply-To: SOLAR-WARNINGS Distribution List <solar-warnings@lut.fi>
X-Sequence: 133
Status: OR

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                           MAJOR SOLAR FLARE ALERT

                          ISSUED: 04:30 UT, 25 JUNE

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                            * No Impact Expected *


MAJOR ENERGETIC EVENT SUMMARY:

              ( All times are valid for the UT day of 25 June )

Flare Size: Class M5.1
  Location: S06    (Unseen Region)
  Tenflare: None.
SESC Times: Begin=25/0302 UT, Peak=25/0322 UT, End=25/0332 UT
            (SESC Times are based on a half-power-point system)
    Sweeps: Type II (In-progress).
                  Estimated shock velocity: 750 km/sec.


PRELIMINARY X-RAY TIME PROFILE DATA AND ESTIMATED STATISTICS:

BEGIN (XRAY)   MAX  (XRAY)   END  (XRAY)   DURATION   INTEG. FLUX   SWF DUR.
------------   -----------   -----------   --------   -----------   --------
 0303 (B7.9)   0322 (M5.1)   0342 (C9.4)   039 MIN.   0.059 J/m^2    033 min

NOTE:  The xray time profile data above is not based on the half-power-point
       system, but is intended to give a general idea of the duration of the
       entire event, from the start to the end when xrays fall below M-class
       levels.  Integrated x-ray flux covers the interval from start to end.


SYNOPSIS:

     A major-category class M5.1 flare erupted from just beyond the
     southeast limb near S10 at 03:22 UTC on 25 June.  The event was
     not particularly strong.  However, it does confirm that the
     region due to rotate into view is quite volatile.  Additional
     strong minor M-class flares and possible major events are
     expected from this unseen region.


POTENTIAL TERRESTRIAL IMPACT ASSESSMENT:

        A geophysical impact is not expected from this event.


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