On September 22, 2004, The Swan station was left unmanned for a period of time as Desmond went after Kelvin during one of his trips out of the Hatch. Due to the confrontation between the two men, Desmond was not able to return to the Hatch in time to enter the Numbers sequence, resulting in a System Failure ("Live Together, Die Alone, Part 1"). At 16:16 based on the clock at the Swan, an electromagnetic pulse was triggered from The Swan as Oceanic Flight 815 was passing over the Island. The EMP either caused or contributed to the the crash by destroying the on-board electronics, communications systems and flight controls. ("[[|]]") An EMP however cannot have caused the structural failure of the aircraft and it is as yet unexplained how the EMP did not affect electronics on the Island or ev