According to the San Diego Union-Tribune, Navy SEAL Commander Seth A. Stone died in a recreational parachuting accident in Perris, California, on Saturday, September 30, 2017, when his parachute failed to open.  The accident occurred while Stone was off duty. 

Stone, originally from Texas, graduated with Basic Underwater Demolition/SEAL (BUD/S) training Class 241 on November 15, 2002, in Coronado, CA.  He began his career in Naval Special Warfare (NSW) with SEAL Team THREE on the West Coast.

Given that the accident occurred while Stone was off duty, the Federal Aviation Administration (FAA) is investigating the incident, which occurred after Stone jumped out of a hot air balloon in Riverside County.  His parachute then failed to open properly, and he perished upon striking the ground.  It was unclear as to why or how his parachute malfunctioned.  The FAA said it typically investigates whether parachutes were packed properly when it investigates skydiving accidents.

According to the Union-Tribune, Commander Stone was most recently assigned to United States Special Operations Command Pacific (SOCPAC) in Hawaii, a unit that is staffed primarily with personnel from the Naval Special Warfare Command (NSWC) in San Diego.