At least 168 people have been killed and 745 injured after a tsunami hit coastal towns on Indonesia's Sunda Strait.
Waves struck at night without any warning, destroying hundreds of buildings.
Officials say the tsunami could have been caused by undersea landslides after Anak Krakatau volcano erupted.
Joining me on the line to discuss this is Emeritus Professor of Oceanography, Frank Shillington. Courtesy #DStv403

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