The three types of tsunamis are: Local Tsunami- It is a type of tsunami that covers an area of 100km or less. The time duration of this tsunami is less than 1 hour or even in minutes.Regional Tsunami- The tsunami which causes destruction in the region covering an area of 1000km of its source is known as a regional tsunami. The travel time of this tsunami is between 1 to 3 hours. Distant Tsunami- The tsunami which is generated far away from the coast or on the other side of the ocean is known as a distant tsunami. This tsunami takes time to reach the coastal area.