Scientists surprised by the strength of earthquake-triggered tsunami in Sulawesi island

An earthquake struck Sulawesi, causing a tsunami that hit Palu City. The quake was a strike-slip type, breaking ground horizontally. It may have triggered an underwater landslide, destabilizing sediment. Palu's bay shape possibly amplified the tsunami's effect.

Explain the process of how the ground breaks during a strike-slip earthquake.

How did the shape of Palu's bays affect the tsunami?