A record 115,000 people in the Indian Ocean region evacuated during the tsunami exercise Indian Ocean Wave 2018 (IOWave18) conducted on 4-5 September 2018. The exercise was coordinated by UNESCO’s Intergovernmental Oceanographic Commission (IOC) as part of the Indian Ocean Tsunami Warning and Mitigations System (IOTWMS). Exercise IOWave18 involved enacting two scenarios – a magnitude 9.0 earthquake off the southern coast of the Islamic Republic of Iran and a magnitude 9.3 earthquake off the western coast of Northern Sumatra on the 4th and 5th September respectively.
Read more here.