Probably not. This is an oft misconception when an aircraft induces the 'Prandtl–Glauert transformation' at high speed that it is breaking the sound barrier. It is merely a compression effect on the moisture in the air. It usually occurs before Mach is attained by pushing the aircraft through the air in such a way that is displaces the air resulting in a compression and depends on the given moisture in the air. Makes for great photography though.
FB-111A Pease AFB 82-87
A-10A Suwon AB ROK 87-88
FB-111A/F-111G Pease AFB 88-90
f22enthusiast wrote:Is this Raptor going supersonic?
A U.S. Air Force F-22 Raptor aircraft participating in Northern Edge 2009 executes a supersonic flyby over the flight deck of the aircraft carrier USS John C. Stennis (CVN 74) while the ship is underway in the Gulf of Alaska on June 22, 2009. The visual effect is created by moisture trapped between crests in a sound wave at or near the moment a jet goes supersonic. Credit: DoD/Petty Officer 1st Class Ronald Dejarnett, U.S. Navy
Trans-sonic most likely. The effect is the Prandtl–Glauert singularity - AKA, vapor cone, shock collar, MACH cone, etc
Yes it is. A high-res version of the shot is available at the link below.
090622-N-7780S-014 GULF OF ALASKA (June 22, 2009) An Air Force F-22 Raptor executes a supersonic flyby over the flight deck of the aircraft carrier USS John C. Stennis (CVN 74). John C. Stennis is participating in Northern Edge 2009, a joint exercise focusing on detecting and tracking units at sea, in the air and on land. (U.S. Navy photo by Sonar Technician (Surface) 1st Class Ronald Dejarnett/Released)