NOAA / Space Weather Prediction Center

SWPC Space Weather Advisory

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

SPACE WEATHER ADVISORY BULLETIN #11- 1
2011 August 04 at 10:58 a.m. MDT (2011 August 04 1658 UTC)

**** GEOMAGNETIC STORM EXPECTED ****

Space Weather Bulletin August 4, 2011

NOAA Region 1261, very active over the past few days, produced the third of a sequence of Coronal Mass Ejections (CMEs) and Solar Radio Blackout Events early today. The net effect of that activity is convergent CMEs expected to disturb the geomagnetic field in the early hours, Universal Time (UTC) of August 5. G3 (Strong) Geomagnetic Storm conditions are likely as well as a distinct chance of S2 (Moderate) Solar Radiation Storm levels being surpassed.

NOAA 1261 is still in a prime position, relative to Earth, for more geoeffective activity in the next few days.

New Solar Cycle 24 is in its early phase now, and this level activity is typical for this time interval. Expect increased space weather activity over the next few years as the Sun erupts more frequently.

For current space weather conditions see: Space Weather Now, Today's Space Weather and Space Weather Alerts


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 SWPC's Space Weather Advisories Web site http://swpc.noaa.gov/advisories or (303) 497-5127.


NOAA Space Weather Scales - Description of catagories used in Outlooks.