An additional effect that is not visualized here is "tidal lag" where these bulges should be rotated slightly forward in the direction of Earth's rotation. Because Earth is spinning, the tidal waves are also dragged along on the surface

A CME from a M3.7 flair on Monday hit Earth yesterday evening. This created aurora that could be seen in central Europe

I took these photos from the lake Amungen, (61° N in Sweden) later in the evening

Time-lapses are posted below
#astronomy #aurora #northernlights #astrophotography #nightphoto

And here is a timelapse of this nights aurora!

A beautiful display of colors tonight 🤩

- Photos taken between: 21:30-23:15 UTC
- Location: Sweden (lat 60°N)
- Conditions: Kp 4, Bortle 5

- Camera: Nikon D7100
- Lens: Sigma 72mm 18-35 f/1.8

#aurora #northernlights #astrophotography #nightphoto