Viewing archive of Thursday, 7 September 2017

Select the desired archive item

Major X1.39 solar flare

Solar activity is once again at high levels. Sunspot region 2673 continues to be very active as it rotates towards the west limb. Today (thus far!) it managed to produce a couple of M-class solar flares and an X-class solar flare.

Read more

Coronal mass ejection arrival

While we were catching some much needed sleep, the coronal mass ejection from Monday's M5.5 solar flare arrived at Earth. Our alert system detected the impact and send out a tweet and a push alert when the shock arrived at DSCOVR around 23:08 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!

100%

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/09/02Kp5 (G1)
Number of spotless days in 2019:189
Current stretch spotless days:19

This day in history*

Solar flares
12011M1.8
21999C9.4
32015C8.8
42001C7.7
52004C7.5
ApG
1199629G1
2200318
3199716G1
4199812
5199911
*since 1994

Social networks