Slow earth-bound coronal mass ejection

Monday, 18 July 2016 - 18:51 UTC

Slow earth-bound coronal mass ejection

A long duration C1 solar flare from sunspot regions 2565/2567 peaked yesterday around 08:00 UTC. It was responsible for a faint coronal mass ejection that likely has an earth-directed component.

A clear shock arrival should not be expected due to the slow speed (about 300~350 km/s) of this coronal mass ejection. The plasma cloud travels at a similar speed as the background solar wind and this makes it harder to detect but an increase in the strength of the IMF should become noticable when the cloud passes our planet most likely on 22 July. It is hard to say what kind of geomagnetic activity we should expect as its crucial with these kind of events that the IMF (Bz) turns southward but for sky watchers at high latitudes it might pay off to stay alert in the days ahead.

Image: It isn't easy to spot but sharp eyes can see the outline of a faint coronal mass ejection with an earth-directed component on this image from SOHO/LASCO.

A C4.4 solar flare that peaked today at 08:23 UTC was associated with a Type IV radio sweep but it does not look like it launched a coronal mass ejection.

Thank you for reading this article! Did you had trouble with some of 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!

Current data suggest that it is not possible to see aurora now at middle latitudes

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:2018/11/05Kp6 (G2)
Number of spotless days in 2018:206
Last spotless day:2018/12/13

This day in history*

Solar flares
12002M2.5
22002M1.9
32001M1.5
42002M1.3
52001M1.0
ApG
1199520G1
2199417
3200413
4200612
5199812
*since 1994

Social networks