“Vulcanian” eruptions

A vulcanian eruption is an explosive type of eruption, emitting lava fragments into the atmosphere which take on a round shape during flight, as they are too viscous or already partially solidified.

The typical shape is therefore that of a rugby ball.
These eruptions have moderate energy, when compared, for example, to Plinian eruptions, and they erupt a large amount of ash, bread-crust bombs and blocks.