Geomagnetic activity reached G3 (Strong) storm levels at 1446 UTC on 12 Sep due to CME effects.
Stay tuned to https://t.co/YLUbTRM02y for updates. https://t.co/kgHxRS4jDP
- NOAA Space Weather Prediction Center
The X1.7 flare originating from just beyond the western limb that was observed at 05/1340 UTC was followed by an X1.1 flare from AR3780 at 1527 UTC. Given the source location an Earth-directed CME is unlikely for the first event. The X1.1 event from is under assessment. https://t.co/GFK43bwFil
- NOAA Space Weather Prediction Center
The Space Weather Prediction Center (@NWSSWPC) has issued the first G4 (Severe) geomagnetic watch since 2005. The aurora tonight/tomorrow morning may become visible over much of the northern half of the country, and maybe as far south as Alabama to northern California.
Story: https://t.co/aZjwoANvRt
- National Weather Service A CME was observed lifting off the Sun on 20 Jan and is expected to cause up to G2 (Moderate) geomagnetic storming on 22-23 Jan (UTC days). A watch has been issued.
- NOAA Space Weather