Major Flare Activity Possible – NOAA SEC Space Weather Bulletin #01-5 – 25 Apr 2001

Official Space Weather Advisory issued by NOAA Space Environment Center
Boulder, Colorado, USA

SPACE WEATHER BULLETIN #01- 5

2001 April 25 at 9:57 a.m. MDT (2001 April 25 1557 UT)

**** MAJOR FLARE ACTIVITY POSSIBLE ****

A large, magnetically complex sunspot group may produce isolated major
flares during the next several days. These flares could result in
category R2 (moderate) radio blackouts. The group, designated as NOAA
Region 9433, is the return of old NOAA Region 9393, which produced a
series of major solar flares during March 29 – April 2 (its April 2
flare was the largest observed during the current solar cycle). NOAA
space weather forecasters report that Region 9433 has been gradually
increasing in size and magnetic complexity since April 21 and could
erupt at any time.

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. More
information is available at SEC’s Web site http://sec.noaa.gov or
(303) 497-5127. The NOAA Public Affairs contact is Barbara McGehan
at bmcgehan@boulder.noaa.gov or (303) 497-6288.