Corona over Balvaird Castle - a photo on Flickriver

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Geomagnetic Storm

Intense aurora displays are generated following massive explosions originating from the sun known as 'coronal mass ejections'. These explosions release clouds of hot plasma containing billions of tons of material travelling at around two million miles per hour. When this material reaches Earth, it interact with Earth's magnetic field to cause events called geomagnetic storms.

The strongest geomagnetic storm in over two decades dazzled photographers and astronomers in May 2024. This G5 storm culminated in a remarkable display of the aurora borealis overnight on May 10th–11th, and was visible from many areas worldwide, including extremely low lying latitudes that have simply never seen the likes of this type or power of aurora, or in fact any aurora at all.

This picture above shows the true nature of the colour present in the night sky during such aurora storms. Shot with a white balance of 5500K, if our eyes were as sensitive as a camera, this is what we would see, a warmer colour than human eyes can see due to the purkinje effect. The purkinje effect describes the situation in human vision: as light levels decrease, the perception of warm colours drops, especially the red end of the spectrum. It is very important to observe the night sky with dark adapted eyes. To properly have your eyes adjusted for light levels this low, one must observe for at least 30 minutes and avoid all forms of artificial light during that time. People that say that the aurora is only good / visible on camera, are often observing the night sky with un-adapted vision, though it must be said that weak aurora will not register with most regular eyes. In the northern hemisphere, we would normally be searching the northern horizon for Aurora however….

Taken on: May 11, 2024

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corona

aurora borealis

May 10th Aurora

Nikon Z8

nikon 14-24mm 2.8S

Night

nightscape

Night sky

beauty in nature

Castle

Scotland

Scottish Highlands

vista

Visit Scotland

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Camera: Nikon Z 8, f/2.8, 8 sec, 14mm, ISO 800 (more info) (hide info)

Camera:	Nikon Z 8
Lens:	NIKKOR Z 14-24mm f/2.8 S
Aperture:	f/2.8
Exposure Time:	8
Focal Length:	14mm
ISO:	800
Exposure Bias:	0 EV
Flash:	No Flash
Exposure Program:	Manual
Exposure Mode:	Manual
Metering Mode:	Multi-segment
White Balance:	Manual
Gain Control:	Low gain up
Color Space:	sRGB
Software:	Adobe Photoshop Lightroom Classic 13.2 (Windows)
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