Dear Viewers,The lecture in this video will empower your knowledge about the \"Phreatic Eruptions and their consequences\".It has been presented precisely and in simplified way. Phreatic eruptions occur every time water and magma come into close proximity. Phreatomagmatic eruptions are volcanic eruptions resulting from interaction between magma and water. In phreatic eruption, no new lava erupts. The phreatic eruption of Mount Ontake generated large amounts of ballistic ejecta. These eruptions are also capable of injecting ash to high altitudes (several kilometers), resulting in severe impacts … How do Phreatic Eruptions form? The extreme temperature of the magma (anywhere from 500 to 1,170 °C (930 to 2,100 °F)) causes near-instantaneous evaporation of water to steam, resulting in an explosion of steam, water, ash, rock, and volcanic bombs. The phreatic eruption is one type of volcanic eruption when magma heats up groundwater or surface water or both and vapor is released with intense pressure along with ash, and rock. Hydrothermal treatment and biorefinery of sewage sludge for waste reduction and production of fungal hyphae fibers and volatile fatty acids “A phreatic eruption, or steam-driven explosion, can occur when hot material and water – ground water as well as oceans or lakes – contact each other. About Phreatic Eruption When magma heats ground water or surface water it results in an explosion of water, steam, rock, and ash, called a phreatic eruption which is also known as a steam-blast eruption, phreatic explosion or ultravulcanian eruption. In 2018, Approximately 5500-meter peak columns of steam and ashes formed, after the phreatic eruption of Mount Merapi in Java Island. These gases are quite harmful for the living beings and environment. According to USGS, phreatic eruptions occur when water beneath the ground or on the surface received intense heat from the mixture of volcanic materials of … A major phreatic eruption occurred in Ruapehu Crater Lake, North Island, New Zealand, at 1975 April 24 d, 03 h 59 m, N.Z.S.T. Only nine minutes of volcanic-seismic activity preceded the eruption, but crater dilation had been measured by a geodetic survey two weeks earlier. As is known, the boiling point of water is 100 °C, however this is only valid under normal atmospheric pressure. Mt. It is common for a large explosive eruption to have magmatic and phreatomagmatic components. This video is helpful for everyone like School going students, college students, UPSC aspirants, PCS, SSC, DSSsB, UGC NET, PGT, TGT etc.प्रिय दर्शक,यह लेक्चर \"Phreatic उत्सर्जन और उसके परिणाम\" के बारे में है जो आपको इससे जुड़े हुए सभी तथ्य को समझने में आपकी मदद करेगा। जो परीक्षा की दृष्टि से भी काफी उपयोगी साबित होगा। इस लेक्चर को तैयार करते समय आप के लिए टाइम का कितना मूल्य है इस बात को भी ध्यान में रखा गया है इसलिए इस लेक्चर की अवधि k जितना कम किया जा सकता था उतना किया गया है।1).Phreatic eruptions क्या है2). A common mechanism for steam-driven explosions at volcanoes – so-called phreatic or hydrothermal eruptions – is the sudden depressurization of hot water. Phreatic eruptions are steam-driven explosions that occur when water beneath the ground or on the surface is heated by magma, lava, hot rocks, or new volcanic deposits (for example, tephra and pyroclastic-flow deposits). Evacuation of residents needed, if not evacuated timely that may lead to human loss. 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