Filament eruption in the SSE quadrant of the Sun produced a partial-halo Coronal Mass Ejection (CME) first observed in coronagraph imagery near 08:45 UTC on June 19 (above). WSA-Enlil model suggests a glancing blow early on June 23.
Beta-Gamma-Delta classified Region 2371 produced two M-class solar flare since it rotated into Earth view couple of days ago. Long duration M3.0 flare produced full-halo CME at 17:35 UTC on June 18 which will likely make a glancing blow at Earth
late June 21 or early June 22.
Image credit: NASA/ESA SOHO/LASCO C2.
Region's second M-class solar flare took place from 06:28 to 07:09 UTC, it peaked at 06:48 UTC as M1.0.
G1-Minor Geomagnetic Storm Watch is now valid for the UTC day of June 22 through the 23rd.
Credit: NOAA/SWPC WSA-Enlil model.
Space Weather Message Code: WATA20
Serial Number: 635
Issue Time: 2015 Jun 20 1007 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Jun 21: None (Below G1) Jun 22: G1 (Minor) Jun 23: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
NOAA Space Weather Scale descriptions can be found at
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Featured image: Partial halo CME on June 19, 2015. Credits: NASA/SDO AIA 304 and NASA/ESA SOHO/LASCO C2 & C3.