Earthquakes have continued to rattle Greece’s volcanic island of Santorini every few minutes through the night and into Wednesday. Authorities have bolstered their emergency plans in case the hundreds of tremors over the past few days are a harbinger of a larger quake to come.

While Greece is in a highly seismically active area, it's extremely rare for any part of the country to experience such an intense barrage of frequent earthquakes.

Experts say the Greek island of Santorini has been hit by more than 1,000 earthquakes, but they're not linked to the region's active volcanoes.