TUBIN Tuesday: Eruption at Cumbre Vieja Revealed in Infrared

Four years ago, the island of La Palma was dramatically reshaped by an eruption at the Cumbre Vieja volcanic ridge. This event, which lasted nearly three months, not only sparked wildfires but also presented a unique opportunity to study high-temperature phenomena with advanced technology.

This striking image, a composite from the TUBIN satellite, showcases the power of combining different spectral views. In the visible spectrum, the eruption site is often obscured by grey smoke, making it difficult to pinpoint the exact location of the molten magma. However, when viewed through the lens of thermal infrared, the story changes.

The magma, a source of intense heat, glows a brilliant yellow against the cooler backdrop of the rest of the island. This stark contrast allows for precise identification and easy overlay onto visible light imagery, creating a more comprehensive understanding of the event.

This composite image serves as a powerful demonstration of why combining multiple spectral channels is crucial in remote sensing. It merges the high ground resolution of the visible spectrum with the infrared spectrum's ability to penetrate smoke and reveal hidden thermal signatures. Both wildfires and magma flows represent significant high-temperature events that can cover vast areas.

Join us next week on TUBIN Tuesday as we explore the capabilities of detecting even smaller, more subtle events. The insights gained from studying events like the Cumbre Vieja eruption highlight the ever-expanding possibilities of satellite observation.