Viewing archive of Friday, 17 December 2021

Select the desired archive item

M1.2 solar flare

We remain very vigilant on the development of sunspot regions 2907 and 2908 in particular but today's highlight actually comes from sunspot region 2911 in the northern hemisphere. It surprised us all with an impulsive M1.2 solar flare (R1-minor) that peaked at 00:51 UTC.

Read more

Latest news

Support SpaceWeatherLive.com!

A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!

Donate SpaceWeatherLive Pro
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2025/03/28X1.1
Last M-flare2025/03/31M1.2
Last geomagnetic storm2025/03/27Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
February 2025154.6 +17.6
March 2025127 -27.6
Last 30 days127 -25.7

This day in history*

Solar flares
12022M9.67
22000M5.89
32001M3.06
42000M2.9
52000M2.71
DstG
12001-387G4
21960-191G4
31989-100G2
41990-88
52003-78G2
*since 1994

Social networks