NOAA / Space Weather Prediction Center

SWPC Space Weather Advisory

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

2011 September 27 at 12:52 p.m. MDT (2011 September 27 1852 UTC)


Summary For September 19-25 A category S1(Minor) Solar Radiation Storm was observed from 23-26 September due to solar activity from active sunspot Region 1302.

Several Category R1 (Minor) - R3 (Strong) Radio Blackouts were observed during the period. The largest events were on 22 and 24 September due to flare activity from sunspot Region 1302.

Outlook For September 28-October 4 R1 (Minor) and R2 (Moderate) Radio Blackouts are expected throughout the forecast period.

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 or (303) 497-5127.

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