When Volcanic Ash Makes Its Own Lightning

A Volcano Adds Lightning to the Eruption 🌋

Francisco Negroni’s photograph shows lightning branching through a volcanic plume, a phenomenon commonly called a dirty thunderstorm. Volcanoes already throw ash, rock and gas into the sky; apparently the production department occasionally decides the scene still lacks electricity.

Negroni has spent years photographing Chilean eruptions, including Cordón Caulle and Calbuco. His long exposures can record several brief discharges, revealing a luminous structure that the eye experiences only in flashes.

Colliding Particles Separate Electrical Charges ⚡

Inside a turbulent ash plume, fragments of rock, ash and sometimes ice collide and separate charge. When the electrical difference becomes large enough, it discharges as volcanic lightning.

The carpet-static comparison works only until scale enters the room. Here the “carpet” is a rising column of hot debris, and the spark can cross a large part of the plume. Researchers distinguish near-vent charging from lightning influenced by ice formation higher in the cloud.

Negroni Waits Where the Plume Can Be Read 📷

The photographer works at a substantial distance and studies weather, terrain and the likely direction of the plume. In his PopPhoto interview, Negroni explains how slow exposures capture lightning with exceptional intensity.

His Calbuco work has also been recognised by the Natural History Museum’s Wildlife Photographer of the Year archive. The result looks supernatural, but it depends on patient positioning, exposure time and a volcano that refuses to take direction.

The Spectacle Also Signals Serious Hazards 🚧

Volcanic lightning can help scientists detect and monitor ash-rich eruptions, especially when clouds or darkness obscure the vent. The plume itself may threaten aircraft and communities through ash, falling debris and poor air quality.

The photograph deserves admiration from a safe distance. The original Reddit discussion preserves the viral image, while Negroni’s credited work supplies the real author behind the special effects. Nature looked at an eruption and thought, Needs more electricity.

Sources

• Original image
• Original Reddit discussion
• PopPhoto interview with Francisco Negroni
• Natural History Museum image archive

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