Sky cam recorded weird flashes over Spiez, Switzerland

On May 27, 2018 SkyWatch Earth Cameras captured strange flashes in the sky over Spiez, Switserland.

The sky cam shows large purple flashes, then suddenly an enormous bright white flash and the night sky turns into daylight.

What has caused these flashes is not clear, but it does not look like a thunderstorm or a meteorite.