NASA Discovers ‘Ghost’ Island in the Caspian Sea

NASA satellites have detected a fascinating phenomenon in the Caspian Sea: the temporary formation of an island following the eruption of the Kumani mud volcano. According to data from NASA's Earth Observatory, the island emerged in early 2023 but had almost completely disappeared by the end of 2024, earning it the nickname “ghost island.” The island was first observed using Landsat 8 and 9 satellite imagery in January 2023, shortly after the volcano erupted. It measured up to 400 meters wide and was accompanied by a visible sedimentary plume extending from its surface. However, by late 2024, the island had diminished significantly, leaving only faint traces of its existence. The Kumani mud volcano, located 25 kilometers off the eastern coast of Azerbaijan, is no stranger to such occurrences. Since its first recorded eruption in 1861, the volcano has periodically created temporary islands, which vanish after short periods. Mud volcanoes like Kumani are common in regions with active tectonic activity. They eject high-pressure mixtures of water, gas, and sediment, forming landmasses that are often unstable and short-lived. The Caspian region is notable for its high concentration of mud volcanoes, with more than 300 such formations in Azerbaijan and on the Caspian Sea shelf. Many of these volcanoes emit combustible gases, particularly methane, which has drawn the interest of scientists and geologists. The connection between these mud volcanoes and the hydrocarbon systems of the South Caspian Basin makes them critical subjects for research. The emergence and disappearance of this “ghost” island in the Caspian Sea highlight how much remains to be understood about mud volcanoes. These transient landforms demonstrate the dynamic forces of nature and underscore the need for further exploration of geological processes occurring on the seafloor.