Hundreds of earthquakes that have rattled the Greek islands since last week have prompted the evacuation of thousands from the tourist hotspot Santorini.Santorini Mayor Nikos Zorzos told The Associated Press that the tremors are a "seismic swarm" and could continue for weeks before eventually diminishing."This phenomenon may play out with small quakes or a single, slightly stronger one, followed by gradual subsidence," Zorzos said, adding he was cautiously optimistic after speaking to seismologists.More than 200 undersea earthquakes up to magnitude 5 have been recorded in the volcanic region since Friday.EMERGENCY CREWS DEPLOYED ON SANTORINI AS EARTHQUAKE SWARM WORRIES GREEK EXPERTSRoughly