Topband: Fwd: AstroAlert: Major X-Class Solar Flare & Earth-directed
Warren J. Walsh
wwalsh@pluto.skyweb.net
Thu, 29 Mar 2001 10:06:26 -0500
Bill,
This might be of interest to the list.
73
Warren - K2BM
P.S. Thanks Warren! You reminded me how much information Cary Oler has at
his site (http://www.spacew.com/) including an area dedicated to 160
Propagation under the Ham Radio link at the top of the home page. Lots of
good info at his site for any unfamiliar with it! TU!...de W4ZV
>Delivered-To: wwalsh@pluto.skyweb.net
>From: Cary Oler <oler@solar.spacew.com>
>Subject: AstroAlert: Major X-Class Solar Flare & Earth-directed Mass Ejection
>To: sun-earth@skypub.com
>Date: Thu, 29 Mar 2001 06:34:08 -0700 (MST)
>X-Mailer: ELM [version 2.5 PL1]
>Sender: owner-sun-earth@skypub.com
>
> A s t r o A l e r t
> Sun-Earth Alert
>
> Solar Terrestrial Dispatch
> http://www.spacew.com
>
> 29 March 2001
>
> MAJOR CLASS X1.7 SOLAR PROTON FLARE ALERT
>
> Supporting imagery is available at:
> http://www.spacew.com/astroalert.html
>
A major class X1.7/1N solar proton flare was observed erupting from the
>mammoth naked-eye sunspot group identified as Region 9393 at 10:15 UTC (5:15
>am EST) on 29 March. This event, although not tremendously large in spatial
>size, was very bright in x-rays. Increasing energetic proton densities at
>greater than 50 MeV (million electron volts) from the event began to be
>observed shortly after 11:00 UTC (6:00 am EST). Protons are expected to
>continue gradually increasing in density throughout the rest of the UTC day.
>There is a risk of proton densities becoming strong enough to begin causing
>minor satellite anomalies (single event upsets, phantom commands, etc).
>
> A fairly well defined Earth-directed full halo coronal mass ejection was
>observed emanating from the Sun, beginning near 10:26 UTC in SOHO spacecraft
>imagery. An accurate time of impact of this disturbance is not yet available.
>However, it is a reasonable estimate to assume that the disturbance will
>impact the Earth on 31 March or perhaps 01 April.
>
> The impact of this latest coronal mass ejection should come on the heels
>of the anticipated impact of an earlier coronal mass ejection (currently
>expected to impact on 30 March). This series of events is likely to result in
>a prolonged period of enhanced auroral storm activity during the 30 March to
>01 or 02 April time frame. Observers interested in watching for auroral
>activity should keep a close eye on the sky and conditions during this time.
>
> An addendum will likely be posted later today concerning this event.
>However, for those who are interested in more real-time information, we
>recommend you make use of one of the following resources for current
>information:
>
> http://www.spacew.com/aurora
> or
> http://www.spacew.com/aurora/forum.html
> or
> #solar and/or #aurora channels on the
> solar.spacew.com IRC Network on ports 6667-6669 or 7000
> (details are available at: http://www.spacew.com/irc)
>
>
>** End of AstroAlert **
>==================================================================
>AstroAlert is a free service of SKY & TELESCOPE magazine, 49 Bay
>State Rd., Cambridge, MA 02138, U.S.A. This e-mail was sent to
>AstroAlert subscribers. If you feel you received it in error, or
>to unsubscribe from AstroAlert, please see our unsubscribe form
>at http://www.skypub.com/news/astroalert/unsubscribe.html or send
>a plain-text e-mail to majordomo@skypub.com with the following
>line (and nothing else) in the body of the message:
>unsubscribe sun-earth e-mail@address.com
>replacing "e-mail@address.com" with your actual e-mail address.
>==================================================================
--
FAQ on WWW: http://www.contesting.com/FAQ/topband
Submissions: topband@contesting.com
Administrative requests: topband-REQUEST@contesting.com
Problems: owner-topband@contesting.com