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>From: oler@HG.ULeth.CA (CARY OLER)
>Newsgroups: rec.radio.amateur.misc
>Subject: GEOMAGNETIC STORM UPGRADED TO MAJOR CATEGORY - 10 JUNE
>Message-ID: <910610100158.272005cc@HG.ULeth.CA>
>Date: 10 Jun 91 16:01:58 GMT
>Sender: daemon@ucsd.Edu
>Organization: UCSD Usenet Gateway
>Lines: 39


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                            GEOMAGNETIC STORM ALERT

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                          Issued:  15:30 UT, 10 June

                                 -------------


ATTENTION:

     The minor geomagnetic storm has been upgraded to a major category storm.
The interplanetary shock from the large class X12+/3B flare arrived near
07:00 UT on 10 June.  Major to severe geomagnetic storm promptly followed.
Conditions are currently at minor to major storm levels.

     Activity is expected to remain at minor to major storm levels throughout
the next 18 to 24 hours.  Some decay can be expected thereafter.

     A major auroral storm began near 07:00 UT on 10 June and is in progress
at the present time.  Auroral activity is expected to become intense enough
to be viewed over some lower latitude regions.

     Significant degradation in HF propagation conditions has occurred and is
expected to continue for the next 24 to 48 hours.  Some improvements can
probably be expected by 12 June, although a full recovery will not likely
occur this week.

     Probabilities are high for VHF auroral backscatter communications.
Conditions are fairly favorable for backscatter on the VHF bands.  For best
results, use directional antennas pointed low in the north or northeast
horizon (below 10 degrees in elevation).  CW transmissions stand the greatest
chance of making it through the auroral-induced flutter.


**  End of Alert  **
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