14. The Connection Between Lightning and Volcanic Eruptions
Often accompanying volcanic eruptions, lightning forms a phenomena known as a “dirty thunderstorm” or volcanic lightning in one of the most amazing shows nature offers. This event gives important new perspectives on volcanic processes and a spectacular visual depiction of the great forces operating during an eruption.
Like the process that generates lightning in ordinary thunderstorms, volcanic lightning results from the electrically charged ash particles in the volcanic plume becoming charged by friction. Electrical potential accumulates until it’s discharged as lightning as these charged particles separate in the chaotic plume.
Fascinatingly, the existence and features of lightning during an eruption can offer vital details on the eruption itself. The frequency and strength of lightning strikes can help one determine the total explosiveness of the eruption and the volume of ash being expelled. For authorities deciding on public safety as well as for volcanologists researching an eruption, this material is invaluable.
Volcanic lightning is not a surface phenomena only. It can take place well into the volcanic plume and offer understanding of the internal dynamics of the eruption. Certain studies have even hypothesised that by changing the chemical makeup of ash particles, lightning may be involved in the production of some kinds of volcanic rocks.
Volcanic lightning is a quite recent topic of investigation, and scientists are always creating fresh instruments and methods to grasp this phenomena. These initiatives improve not just our knowledge of volcanic processes but also help us to better grasp atmospheric electricity and lightning generation.