Coronal mass ejection arrival
Saturday, 1 July 2017 17:26 UTC
A coronal mass ejection shock arrived at DSCOVR today at 16:27 UTC and it increased the total strength of the interplanetary magnetic field to a respectable 18nT.
This is likely the early arrival of the 28 June CME. DSCOVR registered an increase of the solar wind speed from 360 to 410km/s at impact (confirmed by ACE) and the total strength of the IMF doubled from 9nT to 18nT. The north-south direction of the IMF (Bz) hasn't showed any major deviations yet but this can still occur once the shock passes and we enter the core of the CME.
A minor G1 geomagnetic storm watch is in effect for the coming 24 hours but it is vital for the north-south direction of the IMF (Bz) to turn southward after the initial shock has passed.
Screenshot of the current solar wind stats exactly one hour after its arrival at DSCOVR. Click here.
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!
Latest news
X2.2 solar flare, SDO outage
Major far side eruption, S1 radiation storm
Coronal hole faces Earth
Latest forum messages
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!
Space weather facts
| Last X-flare | 2024/12/08 | X2.2 |
| Last M-flare | 2024/12/22 | M1.0 |
| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2024 | 152.5 -13.9 |
| December 2024 | 103.3 -49.2 |
| Last 30 days | 115.4 -40.8 |