Viewing archive of Monday, 21 September 2015

Select the desired archive item

M2.1 solar flare, glancing blow shock passage possible

Sunspot region 2415 produced an M2.1 solar flare (R1-minor) that peaked yesterday at 18:03 UTC. This solar flare was a long duration event and early imagery from SDO suggested right away that this solar flare was associated with a coronal wave and coronal dimming. Fancy words... yes we know... but these two solar features are classic signs that the solar flare launched a coronal mass ejection.

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!

SpaceWeatherLive Pro
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/12/08X2.2
Last M-flare2024/12/22M1.0
Last geomagnetic storm2024/12/17Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
November 2024152.5 -13.9
December 2024103.3 -49.2
Last 30 days115.4 -40.8

This day in history*

Solar flares
11999M7.71
22013M4.82
32023M3.33
42013M2.8
51999M2.61
DstG
11982-101G3
22014-71G1
32001-59
41987-59
51989-58G1
*since 1994

Social networks