Monday, 19 October 2015 - 17:25 UTC
A minor coronal hole faced Earth yesterday and solar wind flowing from it could arrive in about 48 hours from now. Active geomagnetic conditions (Kp4) could occur once the solar wind stream arrives.
Geomagnetic conditions are quiet right now but we did had one period where we reached the G1 minor geomagnetic storming threshold yesterday due to what was likely a minor coronal hole solar wind stream that carried a mostly southward Bz component of the IMF. Aurorae were seen from multiple high latitude and even upper middle latitude locations like:
Russell Wiltshire Photography - Point Addis near Anglesea, Australia:
Jani Ylinampa Photography - Rovaniemi, Finland:
What likely are the remains of sunspot region 2422 has rotated into view and it is now known as sunspot region 2437. While there were two M-class solar flares from this area on 17 October, we have to conclude that the spots which are visible right now pose no threat for further M-class activity.
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|Last geomagnetic storm||2020/04/20||Kp5 (G1)|
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