NOAA / Space Weather Prediction Center

SWPC Space Weather Advisory

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

2017 August 20 at 10:31 p.m. MDT (2017 August 21 0431 UTC)


Summary For August 14-20

An R1 (Minor) radio blackout was observed on 20 August due to flare activity from active sunspot Region 2672.

G1 (Minor) geomagnetic storm levels were observed from 17-20 August due to coronal hole high speed stream effects.

Outlook For August 21-27

There is a chance for R1-R2 (Minor-Moderate) radio blackouts for the forecast period (21-27 August) due to flare potential from Regions 2671 and 2672.

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.