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Information book:
Synopsis
Mount Ijen Tua erupted violently. Its magma chamber was empty. Then... Crash! It collapsed! Yes, the entire body of the mountain collapsed, which occurred no earlier than 300,000 years ago and no later than 50,000 years ago, forming a giant bowl with a depth of more than 600 meters. Its diameter is oval with a diameter of 12 kilometers from north to south and 15 kilometers from west to east. This collapse formed the Ljen caldera until the time this book was published. Furthermore, discussions about the initial conditions of Mount Lijen Tua and the products of the caldera eruption are discussed in this book to provide additional information that could potentially be beneficial.