Ring of Fire

    Objects that are hot emit a lot of energy, which a satellite's infrared sensors can detect and record. The hotter the object the brighter it appears on the image. Before a volcano erupts it usually has increased thermal activity which appears as elevated surface temperatures (hot spots) around the volcano's crater. Early detection of a "hot spot" and monitoring is a key factor in predicting possible volcanic eruptions.

    Take a look at this infrared satellite image. Can you find and click on the hottest spot?

Tutangiaq looking towards the infrared satellite image on the right

Hot spot on Chuginadak Island
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Hot spot on Chuginadak Island Infrared satellite image indicating hot spots