The explosion of the Krakatau caldera volcano caused the tsunami. Enshunada Sea, Japan An earthquake, estimated to have been at least magnitude 8.3, caused tsunami waves along the coasts of Kii, Mikawa, Surugu, Izu and Sagami. The waves were powerful enough to breach a spit, which had previously separated Lake Hamana from the sea. Enshunada Sea, Japan - 20 September 1498 There were reports of homes flooding and being swept away throughout the region, with a total of at least 31,000 people killed. On the Sendai Plain, the maximum inundation height was 19.5 m, and the tsunami bore propagated more than 5 km inland. Iwate Prefecture, which is an area at high risk from tsunami, had tsunami barriers walls (Taro sea wall) totalling 25 kilometres (16 mi) long at coastal towns. Enshunada Sea, Japan – 20 September 1498 An earthquake, estimated to have been at least magnitude 8.3, caused tsunami waves along the coasts of Kii, Mikawa, Surugu, Izu and Sagami. About 40,000 people were killed. Although the volcanic eruption was responsible for killing 2,000 people as well. It washes against the coast several times with great speed and force. The Fukushima Daiichi nuclear disaster was directly triggered by the 2011 Tōhoku earthquake and tsunami, when waves exceeded the height of the plant's sea wall. Observations have confirmed the runup height of 130 ft in parts of Japan. 6-Enshunada Sea, Japan – 20 September 1498 As the tsunami radiated out from Japan, it encountered the complex topography and bathymetry of sea floor, causing the wave to scatter and reflect. The word tsunami (pronounced soo-NAH-mee) is Japanese; it is derived from tsu, which means harbor, and nami, which means wave. The U.S. Pacific Tsunami Warning Center (PTWC) reported a wave with maximum height of 2.79 meters (9.2 feet) at an observing station at Hanasaki, Hokkaido, at 3:57 p.m. local time (06:57 UTC). 2) Sea Level: Observed Water Heights and Computed Travel Times (NGDC, JPG, 2.6 MB) Observed Water Heights in Japan (NGDC, PNG, 5 MB) Philippines NAMRIA Sea Level Stations (OCEANOWEB, PDF, (2.9 MB) Tsunami Observations (Japan JMA, PDF, 164 KB) Japan Tide Gauge Data (Japan JMA, PDF, 61 KB) Tsunami Observations, 21 Mar 2011 (PTWC, ZIP of KMZ, 180 KB) (Tsunami ensuing) Along the ria coast from about 50 to 200 km north of Sendai, the narrow bays focused the tsunami waves, generating the largest inundation heights and run‐ups. The waves were powerful enough to breach a spit, which had previously separated Lake Hamana from the sea. Date: September 20, 1498 Year: 1498 Magnitude: 8.3 Surface Wave Magnitude: 8.3 Total Deaths: wasn't certain between 26, 000 to 31, 000 Total Damage: Severe Rapair Cost: $5 to $24 million Houses Destroyed: 1, 000 The earthquake first occured on September 20, 1498 off the coast of Other PTWC reports: 1.27 meters (4.2 feet) at 10:48 UTC at Midway Island; 1.74 meters (5.7 feet) at 13:72 UTC at Kahului, Maui, Hawaii Waves reached the height of 37 m were and destroyed the towns of Anjer and Merak. Waves reached a height of 1,720 feet (576 meters) in the bay, but because the area is relatively isolated and in a unique geologic setting, the tsunami did … After 8 hours, the tsunami hit Hawaii and after 9.5 hours, the tsunami made landfall on the west coast of the United States. A tsunami is a series of huge waves.