The Closer a Volcano Is to Erupting, the Greener the Trees Around It Look From Space

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What do volcanoes and rock music have in common? You can see this in this lecture by Thoralf Dietrich.

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A volcanic eruption is a phenomenon that arouses curiosity and unique images. It is also a source of great concern, especially for the approximately 10% of the population that lives near an active and potentially dangerous volcano. And for these people, an important warning sign can come from beings that do not speak our language: trees. The signs occur because, before volcanic eruptions, carbon dioxide gases are released from the magma below th…

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The shade of the leaves of the trees alone could provide an observable satellite signal announcing an imminent volcanic eruption, according to a study. When they are about to erupt, the volcanoes release CO2 that rises to the surface with the magma. This gas, by accumulating in the soil, would stimulate photosynthesis and make the surrounding trees greener and luxuriant. The detection of this "greening" by satellite imagery could thus be a promi…

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Predicting volcanic eruptions could prove lifesaving, and a new study suggests that vegetation near active volcanoes can provide clues to underground activity. Just before they erupt, volcanoes push magma closer to the surface, releasing increased levels of carbon dioxide. This in turn can boost the health of nearby trees, making their leaves greener. These changes – specifically measurements of the non-linear vegetation index (NDVI) – can be de…