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.

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.

Hundreds more people were expected to leave Greece's Santorini island on Wednesday as tremors shook the popular summer tourist destination for a sixth day. About 10,000 people have left on ferries and planes in recent days as hundreds of small quakes were registered in the surrounding sea,