An eruption by Mount Etna on the Italian island of Sicily could be the cause of a local time shift
July 11, 2011 was Etna's 5th eruption of that year. It was strong and short. Afterwards thousands of Sicilians noticed that their watches, alarms and even computer clocks were running 15 minutes fast.
Could the volcano be the trigger event? Or was another event that activated the volcanic time shift. Perhaps the heat of the volcano causing fluctuations in temperatures in mechanical and electronical devices?
There is no logical explanation, for now. Perhaps when science has found out more about certain frequencies coming from the trembles of a volcano and the emsission of smoke, dust in synergy with steam, from water.
More info: Daily Mail. Mount Etna eruption closes airports and 'knocks clocks 15 minutes fast'.