June Solstice 2015

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The June solstice is the Summer Solstice in the Northern Hemisphere and the Winter Solstice in the Southern Hemisphere. It took place at 16:39 UTC on 21 June.

Meteosat-10, Natural Colour RGB, 21 June 16:30 UTC
Date & Time
19 June 2015 23:15 UTC–22 June 00:30 UTC
Satellites
Meteosat-10
Instruments
SEVIRI
Channels/Products
Natural Colour RGB, High Resolution Visible (HRV)

By Jose Prieto (EUMETSAT)

Around the June solstice, the sun reaches the most northern latitudes even at midnight. A particular geometry between the sun, reflective surfaces like quiet waters and the Meteosat satellite, produces sun glint, which propagates, if strong, to the pixels west of the reflecting surface. In the animation you find these occurrences to the north and west of Iceland and Norway, the Bothnian Bay, White Sea and some Russian and Finnish lakes.

Figure 1
 
Animated gif of Meteosat-10 Natural Colour RGB, 19 June 2015 23:15 UTC–22 June 00:30 UTC

Download animation (MP4, 288 KB), 19 June 2015 23:15 UTC–22 June 00:30 UTC
Download full resolution Natural Colour RGB, Meteosat-10, 21 June 16:30 UTC

This 15-min time step, Meteosat-10 HRV loop, 21 June 00:00 UTC–22 June 00:00 UTC (MP4, 8 MB) shows the movement of the illumination from the Sun, over the north pole, throughout the day of the solstice. If you stop the animation at 16:30 UTC, this will be the moment when Sun reached the highest point in the northern hemisphere in 2015. Sun glint can also be clearly seen in this animation.

This graphic shows the location of the Meteosat sun glint centre for any time of the year.

Previous case studies

Summer solstice in SEVIRI imagery, 21 June 2014
Meteosat sunglint on the Southern Ocean around solstice, 21 December 2013
Seeing solstices and equinoxes from space, 21 June 2011

 
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