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Rare proton arc over Canada

We see lots of photos here at EarthSky, but few photos of a proton arc. It’s a rare type of aurora, and experts aren’t entirely sure what causes it.

Dave Markel captured this proton arc near Kamloops, British Columbia, Canada, on September 28, 2016.

Proton arc captured using a Nikon D300 with Tokina 11-16mm f/2.8 lens. EXIF: 11.5mm – F/2.8 – 30 sec – Iso 2000. Photo by Dave Markel.

Dave Markel wrote that – while aurora chasing – he captured this proton arc near Kamloops, British Columbia, Canada, on September 28, 2016. This photo is a five-image composite of the event.

Thank you, Dave!

A proton arc is indeed rare. Although many experts say they’re caused by protons from the sun (giving them their name), other experts disagree. You can read more about what might, or might not, cause proton arcs at Spaceweather.com.

Bottom line: Proton arc over Kamloops, British Columbia, Canada in September 2016.

Visit Dave Markel Photo on Instagram

Deborah Byrd

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