Propagation

ARRL News

X1.1 solar flare, G2 watch

July 1, 2026
We kick of the month of July with some nice solar activity! Sunspot region 4479 has been growing nicely and is now a complex Beta-Gamma-Delta region which yesterday at 20:50 UTC erupted…

G3 geomagnetic storm watch for 4 and 5 June

June 4, 2026
Finally some action from the Sun! Arctic latitudes on the northern hemisphere might be enjoying the midnight sun but lower latitudes and of course our friends down under should be alert of…

Coronal hole faces Earth

May 13, 2026
A coronal hole is facing our planet today which is sending a high speed solar wind stream towards us which could cause enhanced geomagnetic conditions (and thus aurora!) in the days ahead.

X1.5 solar flare

March 30, 2026
Surprise! An X1.5 solar flare (R3-strong) peaked today at 03:19 UTC. Soruce of the solar eruption was Active Region 4405 (Beta-Gamma) in the Sun's southeast quadrant. 

M2.7 solar flare, CME arrival possible

March 17, 2026
A slow asymmetrical halo coronal mass ejection (CME) was launched yesterday during an M2.7 solar flare. Sunspot region 4392 near the central meridian was the source of the eruption.

Complex sunspot region 4366

February 1, 2026
Sunspot region 4366 has developed into a complex sunspot region with a magnetic Beta-Gamma-Delta layout. The region is impressive and has been producing strong solar flares today including two M5 events, two…

CME impact! S4 solar radiation storm

January 19, 2026
Impact! We just saw the arrival of the coronal mass ejection that was launched during yesterday's X1.9 solar flare. This means it took the CME only 25 hours to travel from the…

X1.9 solar flare with earth-directed CME

January 18, 2026
A long duration X1.95 solar flare (R3-strong) has peaked today at 18:09 UTC which came from sunspot region 4341. This region is located close to the center of the earth-facing solar disk.…

M8.1 solar flare with earth-directed CME

December 7, 2025
Sunspot region 4299 produced an M8.1 solar flare (R2-moderate) which peaked at 20:39 UTC yesterday. Type II and type IV radio emissions were registered along with coronal dimming which are all typical…