Space Weather Outlook September 11, 2017 at 05:12AM

Official Space Weather Advisory issued by NOAA Space Weather Prediction Center Boulder, Colorado, USA SPACE WEATHER ADVISORY OUTLOOK #17-37 2017 September 11 at 2:45 a.m. MDT (2017 September 11 0845 UTC) **** SPACE WEATHER OUTLOOK **** Summary For September 4-10 R1 (Minor) radio blackouts were observed on 04-09 September, R2 (Moderate) radio blackouts were observed on 04, 07, 08 September, and R3 (Strong) radio blackouts were observed on 06, 07, 10 September due to solar flare activity from active sunspot Region 2673. S1 (Minor) solar radiation storm levels were observed on 05-09 Sep and 10 September, S2 (Moderate) solar radiation storm levels were observed on 05-08 September and 10 September, and S3 (Strong) solar radiation storm levels were observed on 10 September due to significant flare activity from Region 2673. G1 (Minor) geomagnetic storm levels were observed on 04 September due to coronal hole high speed stream activity. G4 (Severe) geomagnetic storm levels were observed on 07 September while G1-G4 (Minor-Severe) storm levels were observed on 08 September due to a combination of activity from the arrival of the 04 and 06 September coronal mass ejections. Outlook For September 11-17 R1-R2 (Minor-Moderate) radio blackouts are expected on 11 September due to the potential for significant flare activity from Region 2673 as it rotates further around the west limb. S3 (Strong) solar radiation storm levels are expected to continue on 11 September and slowly decrease below S1 (Minor) storm levels by 15 September. G1 (Minor) geomagnetic storm levels are likely from 13-16 September with G2 (Moderate) levels likely on 13 September due to recurrent coronal hole high speed stream activity. 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 SWPC's Web site http://swpc.noaa.gov Thank you for using the Product Subscription Service. If you would like to remove a product subscription or update the personal information in your account, go to the Product Subscription Site. Please do not use the from address for correspondence, as it is not monitored. For comments or help, please contact SWPC Help.