More than 1,000 people were injured and 11,600 people displaced after the tsunami hit between Java and Sumatra on Saturday, December 22, the Guardian reports.
The district of Pandeglang, on the western tip of the island of Java was worst hit.
It is believed the Anak Krakatau volcano erupted underwater, which may have caused an underwater landslide, triggering the tsunami.
The Guardian reports the exact cause of the tsunami won’t be known until it is safe enough for sonar monitoring to be undertaken.
The University of Melbourne associate professor David Kennedy told the newspaper shaking earth can act as a warning of tsunamis caused by earthquakes, but it is harder to anticipate tsunamis from volcanic eruptions.
Indonesia has 147 volcanoes, 76 of which are considered active.
The Foreign Office said those in the area should follow the local authorities’ advice.
“The British Embassy is in contact the Indonesian authorities and monitoring the situation closely,” said the FCO on its website.
