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Indonesian tsunami's size was shocking, scientists say

The size of the tsunami that followed Friday's magnitude 7.5 earthquake in Indonesia was an astonishment to researchers because the quake occurred at a strike-slip fault, which, scientists say, usually causes little vertical movement. The tsunami, which killed hundreds of people and devastated the city of Palu, could be explained by an undersea landslide or the shape of the bay near Palu, say scientists, who also noted that Indonesia has inadequate tsunami detection and warning systems.

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