New Delhi, July 31 -- A powerful earthquake struck Wednesday off Russia's Far East coast, flooding a fishing port with waves from a tsunami, cutting power to a few areas and sending some panicked residents fleeing buildings but causing only a few injuries.

Regional authorities say they were prepared for the 8.8-magnitude quake and the subsequent waves, and moved quickly to keep residents safe. They introduced a state of emergency in some areas, but said there was no major damage.

Here is what to know about the Russian areas hit by the quake and tsunami:

Kamchatka peninsula

Dubbed the "land of fire and ice," Kamchatka is one of the most active volcanic regions on Earth. It has about 300 volcanoes, with 29 of them still active, accordin...