That meant the first generation of SSTs were banned from flying at supersonic speed over land, which greatly reduced the appeal of supersonic aircraft. (cnbc.com)
Now, Knipp and her team have determined that when such powerful CMEs come off the sun and speed toward Earth, they create shock waves much like supersonic aircraft create sonic booms. (sciencedaily.com)
Current regulations ban commercial supersonic aircraft from operating over land. (cnbc.com)