Earth Observatory Science Earth Observatory A School of Mud Volcano… Earth Earth Observatory Image of the Day EO Explorer Topics All Topics Atmosphere Land Heat & Radiation Life on Earth Human Dimensions Natural Events Oceans Remote Sensing Technology Snow & Ice Water More Content Collections Global Maps World of Change Articles Notes from the Field Blog Earth Matters Blog Blue Marble: Next Generation EO Kids Mission: Biomes About About Us Subscribe 🛜 RSS Contact Us Search Long spits of muddy sediment are visible behind islands created by mud volcanoes in an image captured on August 30, 2025, by the OLI (Operational Land Imager) on Landsat 8. NASA Earth Observatory/Lauren Dauphin Today’s story is the answer to the April 2026 puzzler. With its abundance of naturally occurring gas seeps and fires, Azerbaijan has long been called “the land of fire.” Yet burning mountains are just one of the geologic wonders found in the small Eurasian country on the Caspian Sea. Azerbaijan is also home to at least 220 mud volcanoes, according to data from the Azerbaijani government, though some researchers put the total number closer to 350. That is thought to be one of the highest concentrations of mud…
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A School of Mud Volcano Islands in Azerbaijan
Source: NASA JPL — US Government, Public Domain