Fig. 5

Calculated site amplifications from simple multi-layer models. a Combined model is a 3 layer model from averaged shallow 4 layers in Fig. 4a as the first layer with two deeper layers down to Vs of 0.67 km/s as indicated in Additional file 1: Table S2a, shallow model is composed from the top two layers of the combined model and the two layers of deep model is composed from averaged shallow two layers of the combined model with basement (Additional file 1: Table S2a). b Same as the panel (a) but combined model is composed by changing the second layer to an averaged layer of deeper two layers of combined model in panel (a) and adding next deep layer with Vs of 1.267 km/s as the third layer (Additional file 1: Table S2b). c Combined model is total 10 layer model as shown in Fig. 3 and Additional file 1: Table S1, shallow model is a four layer model with a combination of the two combined model in panels (a) and (b), deep model has two base layers that have Vs of 1.759 km/s as an average of deeper layers and Vs of 3.2 km/s as the seismic bedrock (Additional file 1: Table S2c)