Dear Steve & Radsafers,
I forwarded your
question to NASA's Larry Kellogg, who kindly provided this bit of information
:
From: Larry Kellogg [mailto:lkellogg@mail.arc.nasa.gov]
Sent:
Tuesday April 03, 2001 12:05 PM
To: Franta, Jaroslav
Cc:
lkellogg@mail.arc.nasa.gov
Subject: Fwd: SOHO records a giant flare on the
Sun
>From: sciweb@estec.esa.nl
>Date: Tue, 3 Apr 2001 12:14:23
+0100 (WET DST)
>To: lkellogg@mail.arc.nasa.gov
>Subject: SOHO
records a giant flare on the Sun
>
>
>Last night at 23:51
Central European Time (21:51 UT, 2 April) the Sun
>unleashed a major solar
flare near its northwestern (upper right-hand) side
>and the event was
well observed by the ESA-NASA SOHO spacecraft. It
> was classified
as an X17 flare, probably the strongest flare since 16
>August 1989 when
an X20 flare occurred. It was slightly more powerful than
> the
famous 6 March 1989 flare which was related to the disruption of
the
>power grids in Canada. The latest event
hurled a coronal mass ejection
>into space - but apparently not towards
the Earth, so the impacts will
>probably be less
severe.
>
>More at: http://sci.esa.int/content/news/index.cfm?aid=1&cid=1&oid=26703
>--------------------------------------------------------------------------
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list,
>please visit this web page:
> http://sci.esa.int/subscribe.cfm
--
Larry R.
Kellogg
lkellogg@mail.arc.nasa.gov
http://lunar.arc.nasa.gov
<><><><><><><><><><><><><><><><><>
Larry
also noted that,
SpaceWeather has some more info on this flare and
I forwarded you that e-mail.
http://www.spaceweather.com
Will see if I can find a
live person ( http://www.google.com has been
good for cut and paste, but
that is from things already posted on the
web )
The astronauts are
supposed to be getting/have some dosimeters and
Ames put out awhile back how
they were contributing to that effort.
Maybe I can find someone here in the
know.
If you hear something before I do, please let me know. I have
a
question about the Van Allen radiation belts and this fits in.
(also
the history of Dr. Van Allen's instruments going to the moon
fits
with lunar exploration even though it is Earth science - trying
to
stay lunar focused - :-)
Larry
<><><><><><><><><><><><><>
.....so
if you have had some other answers on this, Steve, please forward them to us as
well.
Thanks.
Jaro
-----Original
Message-----
From: Frey, Steven R. [mailto:sfreyohp@SLAC.STANFORD.EDU]
Sent:
Monday April 02, 2001 3:14 PM
To: RADSAFE (E-mail)
Subject: Solar activity
dose to ISS astronaut
Fellow Radsafers -
What was the dose a
crewmember aboard the
International Space Station (ISS) likely received
from
last week's sunspot/solar flare event? Curious here.
Thanks in
advance for any
response.
Steve
***********************************************************************
Steven
R. Frey,
Radiological Control Manager
Stanford Linear Accelerator Center
(SLAC)
Room 266, Building 24, Mail Stop 84
2575 Sand Hill Road
Menlo
Park, CA 94025
Phone: (650) 926-3839
email address:
sfreyohp@SLAC.Stanford.EDU
Any opinion expressed here is the opinion of
the writer
alone and is not meant to speak on behalf of
SLAC
***********************************************************************