Tsunami is a word in Japanese language and originally means a great sea wave rushing into "tsu" pr port. In Japan tsunami denotes two types of meteorological tsunami, and the other is for tsunami generated by earthquake which also known as seismic sea wave.
The Sunda Strait is situated between the island of Java and Sumatra, connecting the Java Sea in the north and the Indian Ocean in the South. In the northern part the strait is narrower and shallower than in the southern part. The narrowest part in the north is only about 24 km wide with depth of less than 8 m.