In fiction, there have been statements and even showings of volcanos erupting, whether a character tanks said eruption or causes it through their power in some way.

For a generic volcanic eruption, the average volcano launches out 50-200 m^3 of lava per second at speeds ranging from 200-300 m/s.

Lets assume said volcano eruptions are at their average middle values, so 125 m^3 of lava launching at 250 m/s. Density of lava is 3100 kg/m^3.

125*3100 is 387500 kg

KE: 12109375000 joules/2.8942100860421 tons, or Large Building level

Lets also assume said volcano eruptions are at their maximum values, so 200 m^3 of lava launching at 300 m/s.

200*3100 is 620000 kg

KE: 27900000000 joules/6.6682600382409 tons, or Large Building level+

Surprisingly lower than how you calculate what is shown in other scenes which go from either City to even higher, but this is only for a generic eruption even if it isn't impressive as actually calculating what is shown in the scene. Should only be used if any other implications of the volcanic eruptions are vague like the scene not showing, but if the volcano eruption is actually shown, then feel free to calculate the object scaling.