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In this photo we see lava emerging from a crack in the water Eruption of the Fagradalsfjall volcanosouthwest of Iceland, on December 19, 2023. It occurred on the Reykjanes Peninsula, where the last volcanic eruption had previously been recorded. 815 years.
This occurred during a volcanic eruption rising magma from within the earth it exerts itself Pressure above the volcano pipe. This pressure can cause the surrounding rock to fracture and create cracks in the volcano's surface. When these cracks open, lava can leak outwards.
This phenomenon is a natural reaction to build up pressure and tectonic forces, and the cracks formed play a crucial role in the release of magma and the formation of new geological structures on the volcano's surface, such as lava flows and volcanic cones.