Mystery Rumble In South Jersey

People in Cape May and Atlantic counties are reporting what some believe have been an earthquake, though others believe it may have been more akin to a sonic boom.
Some have placed the time at about noon, while others say it was closer to 2 p.m.
Story at
http://www.shorenewstoday.com/snt/news/index.php/regional/cape-may-county/58656-earthquake-or-sonic-boom-residents-report-a-rumble.html

Mystery solved??
http://www.shorenewstoday.com/snt/news/index.php/regional/cape-may-county/58777-navys-supersonic-aircraft-put-the-boom-in-the-skies.html