Considering that the liquid sample is flammable, it wouldn’t be a good idea to have it near a source of fire which the Bunsen burner provides, rather it would be better to heat through an electric hot plate as its not near a source of flame and instead produces heat through electricity.
Tsunamis are formed by tectonic plates smashing into one another. They are caused by earthquakes, landslides, volcanic eruptions, and even under sea earth quakes.