Russia and Japan issued tsunami warnings after a massive undersea volcanic eruption in the island country of Tonga caused a wave surge in the Pacific, reported Sputnik. The underwater eruption could trigger waves of up to 20 centimetres (8 inches) in Russia's Kuril Islands, Sputnik quoted Russian emergency authorities in the Pacific coast district of Sakhalin as saying.

Meanwhile, the Japan Meteorological Agency said that it expected surge waves of up to 3 meters (10 feet) to reach the Amami and Tokara Islands, both part of the Ryukyu archipelago stretching southwest to Taiwan.