Massive earthquake sparks tsunami fears
Wall of water: The initial waves swamped towns in Russia's Far East, but fears of overwhelming waves did not materialise in much of the rest of the world. Glossary
Peninsula - A piece of land that sticks out from a larger area and is mostly surrounded by water.
Kuril Islands - A volcanic archipelago of 56 islands in the Russian Far East.
Tsunami - A Japanese word describing a succession of waves caused when an earthquake or volcano displaces a large body of water.
Hawaii - Situated in the Pacific Ocean, it was made a US state in 1959 and is the only island state.
Earthquake - The shaking of the surface of the Earth after a sudden burst of energy at a tectonic plate boundary.
Seismologists - A scientist who studies earthquakes and seismic waves.
AI - A computer programme that has been designed to think.
Resilience - The quality of toughness and flexibility that enables you to bounce back after setbacks.