Assessing tsunami risk along the Aceh coast, Indonesia: a quantitative analysis of fault rupture potential and early warning system efficacy for predicting arrival time and flood extent

This study delves deeper into the ETA of tsunamis caused by the Aceh-Andaman, Nias-Simeulue, and Batu segments. Its main objective is to chart out the critical response time that communities residing in the coastal areas of Aceh and strategic areas on outer islands of Sumatra, like Weh Island, Nasi Island, Breuh Island, Simeulue Island, and the Banyak Islands, have at their disposal to respond to, and to evacuate, after an earthquake.

The findings highlighted critical ETA ranges: 8–25 min on northern coasts, 19–37 min on western shores, 17–27 min on southwestern coasts, and 11–67 min on southern coasts. These results are essential for enhancing early warning systems and optimizing evacuation plans, and bolstering coastal community preparedness and resilience to tsunamis.However, the effectiveness of evacuations also depends heavily on the ability of communities to adapt their behavior in accordance with the ETA allocations provided