Official Space Weather Advisory issued by
NOAA Space Environment Center Boulder, Colorado, USA
SPACE WEATHER ADVISORY BULLETIN #05- 4
2005 July 27 at 9:36 a.m. MDT (2005 July 27 1536 UTC)
**** SOLAR ACTIVITY INCREASING ****
A minor radio blackout (R1) occurred today at 27/0502 UTC (26/2302 MST).
This activity indicates the likely return of old NOAA active sunspot region 786
to the front side of the Sun. During the last rotation across the Sun (01 - 14
July), this region produced moderate to strong
(R2 - R3) radio blackouts, and minor to moderate geomagnetic (G1 - G2) and solar
radiation storms (S1 - S2). Solar imagery over the past few days indicated
several strong eruptions from behind the Sun, which were assumed to be
associated with this region. Further major eruptions are anticipated from this
region.
Agencies impacted by solar flare radio blackouts, geomagnetic storms, and solar
radiation storms should continue to closely monitor the space environment over
the next two weeks.
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