Coronal hole faces Earth

Saturday, 13 May 2017 08:40 UTC

A coronal hole is facing Earth. Enhanced solar wind could arrive in ~3 days - Follow live on https://t.co/T1Jkf6i4Cb pic.twitter.com/9ogfcyLs6U

— SpaceWeatherLive (@_SpaceWeather_) May 12, 2017

This coronal hole is no new solar feature, it was already present on our Sun during the previous solar rotation. It however cause minor geomagnetic storm conditions on 19 April and moderate G2 geomagnetic storm conditions on 20 April.

The coronal hole did change in shape during its trip around the far side of the Sun but it is still a trans-equatorial coronal hole so we should see a decent solar wind impact from it. The solar wind stream will likely take about 2 to 3 days to cover the Sun-Earth distance and from that we can conclude that minor G1 geomagnetic storm conditions on 16 May will be possible. The Moon might be an issue however as its still lit for about 78% on 16 May, which means weak aurora might be harder to spot. Nonetheless finally something to look out for, especially for our friends in the southern hemisphere where the nights are becoming longer and longer as we approach the June solstice.