Incoming coronal mass ejection?

Thursday, 22 October 2015 17:33 UTC

Incoming coronal mass ejection?

Sunspot region 2434 produced a long duration C4.4 solar flare that peaked today at 03:40 UTC. This solar flare was accompanied by a coronal mass ejection that is propagating mostly southwest of the Sun-Earth line. Sharp eyes can discover a very faint full halo outline if you watch the LASCO coronagraph imagery meaning an earth-directed component can not be excluded.

Images: LASCO C2 and C3 coronagraph imagery showing the coronal mass ejection from today's C4.4 solar flare.

This coronal mass ejection launched at a speed of about 800km/s which gives a possible arrival time somewhere during the first half of October 24. A shock in the solar wind is possible but we doubt there will be any significant (G1 or greater) geomagnetic disturbances from this event. Nonetheless it is something to watch out for in the days ahead, you never know with CMEs!

Note that the low energy protons and electrons as measured by ACE EPAM also started to increase following the event which is also a possible sign that there might be some ejecta on the Sun-Earth line.

Image: ACE EPAM data at 22-10-2015 17:35 UTC.

Any mentioned solar flare in this article has a scaling factor applied by the Space Weather Prediction Center (SWPC), the reported solar flares are 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.

Thank you for reading this article! Did you have any trouble with the technical terms used in this article? Our help section is the place to be where you can find in-depth articles, a FAQ and a list with common abbreviations. Still puzzled? Just post on our forum where we will help you the best we can! Never want to miss out on a space weather event or one of our news articles again? Subscribe to our mailing list, follow us on Twitter and Facebook and download the SpaceWeatherLive app for Android and iOS!

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%
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2024/11/06X2.39
Last M-flare2024/11/13M1.7
Last geomagnetic storm2024/11/10Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
October 2024166.4 +25
November 2024166 -0.4
Last 30 days163.2 +18.4

This day in history*

Solar flares
11999X1.15
21999M8.06
32005M5.58
41999M4.11
52005M3.72
DstG
11960-167G3
21998-109G2
32012-108G2
41989-105
51979-90G1
*since 1994

Social networks