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From: oler@rho.uleth.ca (Cary Oler)
Message-Id: <9306071616.AA23628@rho.uleth.ca>
Subject: WARNING: Potential Satellite Proton Event Warning
To: solar-warnings@lut.fi
Date: Mon, 7 Jun 93 10:16:16 MDT
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                  /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\

                   POTENTIAL SATELLITE PROTON EVENT WARNING

                          ISSUED: 16:00 UT, 07 JUNE

                  /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\


ATTENTION:

     A major class M5.4/2N flare erupted at 14:25 UT at S09W30 (Region 7518).
This flare has been associated with a Type IV sweep and showed a fairly
respectable integrated x-ray flux.  Over the last 20 minutes, protons at
greater than 10 MeV have shown a very slight positive increase in flux as a
result of this energetic event.  An almost imperceptible (presently
negligible) increase in protons at greater than 100 MeV has also been
registered.  There is a small chance protons may continue to increase to
event levels of 10 pfu over the next several hours.  An enhancement above at
least 1 pfu is almost certain.

     Communicators reliant on HF polar-path communcation should be aware of
the increased risk for a possible polar-cap disturbance as a result of this
anticipated proton activity.  Polar cap absorption is not expected to
increase very significantly, although variations in VLF signals could affect
the accuracy of systems such as the OMEGA navigation system.

     A major flare alert is forthcoming.

     Use the Internet command: "finger solar@xi.uleth.ca" for current plots
of protons at greater than 1, 10 and 100 MeV.


**  End of Warning  **


