Fig. 1From: Global optimization of a numerical two-layer model using observed data: a case study of the 2018 Sunda Strait tsunamiComputation domain for the tsunami model in the Sunda Strait. The red box represents the main region with a resolution of 180Â m and covering the Sunda Strait. For the tsunami runup area model, the transition region with a resolution of 60Â m is shown by the blue dashed box, and the observed region with a resolution of 20Â m is shown by the blue solid box. The orange box is the location of Anak Krakatau in the middle of the Sunda Strait; the dashed box has a resolution of 60Â m, and the solid box has a resolution of 20Â mBack to article page