Japan is commemorating the fourth anniversary of an earthquake and an ensuing tsunami that left thousands of people dead, injured and missing, as well as a nuclear crisis at the country’s Fukushima nuclear power plant.Ceremonies were held in towns and cities around the disaster zones, and in the capital city, Tokyo, led by the royal family and high - ranking officials. In remembrance of the tragic event, Tsunami alarm sirens were set off at the moment when the 9 - magnitude undersea quake hit the country back in 2011, and a moment of silence was observed. On March 11,2011, a 9 - magnitude undersea megathrust earthquake hit the coast of Japan, with its epicenter approximately 70 kilometers(43 miles) east of the Oshika Peninsula. It was the most powerful earthquake to have ever hit the country. The quake triggered a powerful tsunami, with waves that reached heights of up to 40.5 meters(133 feet). In six minutes, the tsunami waves hit Japan’s Pacific Rim, causing flooding, landslides, and fires, as well as damaging buildings and infrastructure. Latest official reports say over 15,850 people were killed and more than 6,150 others injured in the disaster. Over 2,580 people also went missing.Read Also:7.2 - magnitude quake shakes northern Japan Government reports also say 127,290 buildings totally collapsed, 272,788 buildings half-collapsed, and 747,989 buildings were partially damaged. The earthquake and tsunami also caused heavy damage to roads and railways and caused fires in many areas. A dam also collapsed. Furthermore, the tsunami caused a meltdown at three reactors in the Fukushima Daiichi Nuclear Power Plant complex, and at least three nuclear reactors suffered explosions after a cooling system failure resulting from the loss of electrical power. Residents within a 20 kilometers (12 miles) radius of the plant were evacuated for fear of nuclear contamination, with residents up to 80 kilometers (50 miles) from the plant also recommended to leave. The World Bank estimated the damage to stand at $235 billion, making the natural disaster the costliest in world history. Source: PressTV