ज्वालामुखी विस्फोट सबसे अधिक विस्फोटक और हिंसक तब होता है जब मैग्मा में होता है:

The outpouring basaltic magma in an effusive volcanic eruption typically has:

Harmonic tremor is a continuous oscillating ground motion occurring during a volcanic eruption, typically with a frequency range of: