Kärdla crater

Kärdla (also Kärdla astrobleme) is a meteorite crater near the town of Kärdla in Estonia.

Kärdla crater
Kärdla astrobleme
Impact crater/structure
Confidence	Confirmed
Diameter	4 kilometres (2.5 mi)
Age	455 Ma
Exposed	No
Drilled	Yes

Location of Kardla

It is 4 kilometres (2.5 mi) in diameter and its age is estimated to be about 455 million years (Late Ordovician). The crater is not exposed at the surface.^[1]

Its formation has been associated with the breakdown of 100km asteroid, that might have also resulted in the Tvären and Lockne craters in Sweden among others.^[2]