A number of Cattle are reported to have died following a mud volcano eruption near the town of San Juan de Urabá in Antioquia Department on the Caribbean coast of Colombia on 25 February 2026. The volcano erupted at about 6.20 pm local time, producing a large column of fire as ejected gas ignited, setting fire to vegetation and damaging the road between San Juan de Urabá and San Juancito, which drivers are advised to avoid until repairs are carried out and an assessment of potential future hazards is carried out.
Unlike regular volcanoes, mud volcanoes are not caused by magma erupting from within the Earth's interior, but rather gasses escaping from buried sediments closer to the surface. Typically this is methane generated by the decomposition of buried vegetation in areas where sediments are accumulating rapidly, leading to the decaying material becoming pressurised. Under these circumstances, the compressed gas will force its way through any cracks into softer layers above (the mud), then erupt rapidly, often bringing lighter oil fractions, also produced by the decomposition of plant material, with it. This creates an explosive mixture, which often ignites in the way seen in Colombia this week, although on other occasions more liquid mud than flammable gas is ejected, creating a messier, but less dramatic eruption.
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