1946 Nankai earthquake
1946 CE.
Shown on the map at 33.000°, 135.600°.
The 1946 Nankai earthquake (昭和南海地震 Shōwa Nankai jishin) was a great earthquake in Nankaidō, Japan. It occurred on December 21, 1946, at 04:19 JST (December 20, 19:19 UTC). The earthquake measured between 8.1 and 8.4 on the moment magnitude scale, and was felt from Northern Honshū to Kyūshū. It occurred more than two years after the 1944 Tōnankai earthquake, which ruptured the adjacent part of the Nankai megathrust.
Text from the Wikipedia article 1946 Nankai earthquake, licensed CC BY-SA 4.0.