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>Path: infoac!unido!mcsun!uunet!zaphod.mps.ohio-state.edu!mips!pacbell.com!ucsd!news-mail-gateway
>From: oler@HG.ULeth.CA (CARY OLER)
>Newsgroups: rec.radio.amateur.misc
>Subject: MAJOR GEOMAGNETIC STORM UPDATE - ALERT AND WARNING CANCELLATIONS
>Message-ID: <910614121313.272017bb@HG.ULeth.CA>
>Date: 14 Jun 91 18:13:13 GMT
>Sender: daemon@ucsd.Edu
>Organization: UCSD Usenet Gateway
>Lines: 64


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                            GEOMAGNETIC STORM UPDATE

                               ALERT CANCELLATION

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                               18:00 UT, 14 June

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


STORM UPDATE INFORMATION:

     Geomagnetic activity subsided after 03:00 UT on 14 June to generally
unsettled conditions.  Unfortunately, for North American aurora observers,
this meant conditions would not be favorable for auroral observations.  The
last disturbance did not have the energy to persist until after dark.
Auroral activity was significantly less active and was generally only
observed over the high latitudes in a diffuse post-storm form.

     We are not expecting any further terrestrial impacts from recent major
flares.  Yesterdays major class M7.3/2N and M5.4/1F flares are not expected
to have a terrestrial impact.  The storm periods have ended.

     A summary of this weeks events will be presented in next weeks STFR
report, which has been postponed due to the high uncertainties which existed
for terrestrial activity this week.

     The ionosphere has been weakened due to the recent storm activity and
will require several days to recover.  Conditions should be back to
near-normal by 17 June.

     The satellite proton event and the polar cap absorption event have
ended.  Proton levels are continuing to decay and are presently at
approximately 5 pfu at greater than 10 MeV.

     Solar Region 6659 continues to exhibit a fairly potent configuration and
could still yield some isolated major flares, although the risk for major
flaring and possible proton flaring is diminishing as it nears the western
limb.  This region is no longer in a sensitive location for producing high
terrestrial impacts.  The other regions visible on the solar surface are not
capable of producing major flare activity.


The following alerts and/or warnings have been CANCELLED:

   - LOW LATITUDE AURORAL ACTIVITY WARNING
   - POTENTIAL GEOMAGNETIC STORM WARNING
   - MAJOR GEOMAGNETIC STORM ALERT
   - SATELLITE PROTON EVENT ALERT
   - POLAR CAP ABSORPTION EVENT ALERT


The following warnings remain IN PROGRESS:

   - POTENTIAL MAJOR SOLAR FLARE WARNING (PROTON ~ 25%)
   - POTENTIAL SATELLITE PROTON EVENT WARNING
   - POTENTIAL POLAR CAP ABSORPTION EVENT WARNING


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