Detail View: NASA Astronomy Picture of the Day Collection: Mjølnir: Impact Crater

Mjølnir: Impact Crater
The stark surface of Earth's moon [ ] is pocked with large craters, records of a history of fierce bombardment by the solar system's formative debris. It may be difficult to imagine, but nearby planet Earth itself has endured [ ] a similar cosmic pounding, though oceans, weathering, and geological activity have removed or hidden many of the telltale scars. For example, this false color image produced from seismic data shows a recently discovered ringed structure [ ] about 24 miles wide on the floor of the Barents Sea [ html/location.html ]. It is most probably the result of the impact, roughly 150 million years ago, of a mile or so wide asteroid-like body. Estimates indicate [ html/environ_cons.html ] that the energy released in the impact could have [ ] been as high as a million megatons of TNT, resulting in immense earthquakes and tidal waves. Drawing on Norse mythology [ ], the crater has been aptly named [ ] Mjølnir - Thor's hammer.
Credit and Copyright: 
F. Tsikalas [ ], S.T. Gudlaugsson, J.I. Faleide, O. Eldholm (Geology Dept., Univ. Oslo [ ])
Barents Sea
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