From: LARRY KLAES (ljk4_at_msn.com)
Date: Fri Nov 21 2003 - 09:02:11 PST
----- Original Message -----
From: Space Environment Center
Sent: Thursday, November 20, 2003 9:46 PM
To: advisory-list-send_at_dawn.sec.noaa.gov
Subject: Space-Weather-Bulletin
Official Space Weather Advisory issued by NOAA Space Environment Center
Boulder, Colorado, USA
SPACE WEATHER ADVISORY BULLETIN #03- 6
2003 November 20 at 10:06 a.m. MST (2003 November 20 1706 UTC)
**** ACTIVE SOLAR REGIONS RETURN ****
The solar regions that produced dramatic space weather activity in late
October and early November have returned to the visible side of the
sun. These large sunspot groups have been numbered as NOAA Region 501
(previous Region 484), 507 (previous Region 488), and 508 (previous
Region 486). All three regions have decreased in size since last
rotation; however, they are bright and show considerable magnetic
complexity. Region 501 has already produced a category R2 (moderate)
radio blackout and spawned a category G4 (severe) geomagnetic storm,
which began today, November 20th, at 2:04 a.m. EST (0804 UTC) and is
strengthening.
The last flurry of activity associated with these regions produced
perhaps the largest radio blackout (R5) measured by the NOAA GOES
satellite in almost thirty years. Moderate to strong activity is
possible for the next two weeks as they make their transit across the
visible disk.
Data used to provide space weather services are contributed by NOAA,
USAF, NASA, NSF, USGS, the International Space Environment Services
and other observatories, universities, and institutions. For more
information, including email services, see SEC's Space Weather
Advisories Web site http://sec.noaa.gov/advisories or (303) 497-5127.
The NOAA Public Affairs contact is Barbara McGehan at
Barbara.McGehan_at_noaa.gov or (303) 497-6288.
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