Schools on four Greek islands will remain closed through next week as earthquakes continue to rattle the region.

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.

A magnitude 5.2 earthquake shook the Greek Aegean islands on Sunday, beginning another week of what geologists are calling an extended earthquake swarm that has sent tourists and residents fleeing.

NBC News’ Matt Bradley reports on the aftermath and public response to several days of near constant earthquakes around the tourist hotspot of Santorini, Greece.