A decades-long mystery buried beneath the North Sea has finally been solved, scientists say, confirming that the Silverpit Crater — a vast, concentric structure hidden roughly 700 meters below the seabed — was created when a 160-meter-wide asteroid slammed into the area somewhere between 43 and 46 million years ago.
Researchers said the collision would have blasted a towering curtain of pulverized rock and seawater roughly 1.5 kilometers into the air and triggered a tsunami more than 100 meters high, a wave that would have radiated outward across what was then a shallow sea covering much of what is now northern Europe. The crater, first identified in seismic survey data gathered by oil and gas prospectors in the early 2000s, has been debated by geologists ever since, with some researchers initially arguing it could be a volcanic or salt-tectonic feature rather than an impact site.
Settling an Old Debate
The new analysis draws on refined seismic imaging and comparisons with other confirmed impact structures to make the case for an asteroid origin considerably more conclusive than earlier studies allowed. Silverpit joins a short list of confirmed impact craters in continental Europe, most of which are far older and more eroded, making the relatively well-preserved, buried North Sea structure an unusually valuable window into what a mid-sized asteroid strike on a shallow sea actually looks like in the geological record.
Because the impact predates human civilization by tens of millions of years, researchers say Silverpit offers a useful real-world case study for scientists modeling the potential consequences of a similar-sized asteroid strike today — a scenario that, while statistically rare, remains one of the natural hazards that planetary defense researchers continue to study and monitor for.