Answer: (There is no picture added. but i will try to answer)
At the border of tectonic plates, recentearthquakes,landslides, volcanic activity, certain types of weather, and—possibly—near-earth objects (e.g., asteroids, comets) colliding with or exploding above the ocean.
Explanation: Places like Indonesia or japan are located at borders of one or two tectonic plates. The crust is not a whole, it is divided. These tectonic plates move at high speed, bumping eacother, causing small tremors that we cannot feel (earthquake). But sometimes,They crash into eachother, folding over another. This causes big earthquakes. When earthquake occurs, tsunamis are caused. There are high chances of tsunamis after very big earthquakes. When objects like asteroids fall into the ocean (rarley happens) They create a big force causing tsunamis. The weather can also affect in bringing tsunamis . eg: A strong gale or storm.