June 28: Mysterious ‘sonar anomaly’ detected off North Carolina’s coast has NOAA ship explorer diving in search of a shipwreck or rock formation

A mysterious ‘sonar anomaly’ detected off the coast of North Carolina has resulted in the National Oceanic and Atmospheric Administration launching a major expedition.

NOAA’s Ship Okeanos Explorer was sent diving on Wednesday to determine if the anomaly was a possible shipwreck or rock formation.

The government agency spent a few days building suspense about the expedition, saying they were unsure if they would find ‘an archaeology site, a geological formation, or otherwise’.