Volcano Eruptions in Indonesia: Causal Factors and Impacts Indonesia, as an archipelagic country with more than 130 active volcanoes, faces major challenges from potential volcanic eruptions that could result in natural disasters. The factors causing volcanic eruptions in Indonesia are very diverse and complex, and the impacts are quite significant for society and the environment. One of the main factors causing volcanoes to erupt is tectonic activity. Indonesia is located on the Pacific Ring of Fire, a zone with high seismic activity due to the movement of tectonic plates. When two plates collide, magma from within the earth can be trapped and form high pressure. This accumulated pressure can trigger an eruption when the magma finds its way out. Geological factors also play an important role. Each volcano has unique characteristics based on its type of lava and geological structure. Explosive type volcanoes, such as Mount Merapi, have more dangerous eruptions because the gas trapped in the magma can explode violently. On the other hand, effusive type volcanoes such as Mount Kilauea tend to emit lava more quietly. Apart from geology and tectonics, environmental factors contribute to the eruption process. Extreme weather changes or earthquakes can trigger volcanic eruptions. When heavy rain occurs, the tension in the magma can increase, causing an eruption. Therefore, monitoring weather and volcanic activity is very crucial. The impact of volcanic eruptions in Indonesia is very broad. From a health perspective, volcanic dust particles can damage the respiratory systems of humans and animals. Residents who live around volcanoes are at high risk of developing acute respiratory diseases due to exposure to volcanic ash. Apart from physical impacts, eruptions can also cause psychological disorders, such as trauma and stress due to losing one’s home. The economic impact of volcanic eruptions is no less serious. Infrastructure, including roads, bridges, and buildings, is often destroyed. Agriculture was also disrupted because agricultural land was covered in volcanic ash. Evaluation of this damage requires significant time and resources, hampering the economic recovery process of affected areas. Apart from short-term impacts, volcanic eruptions have long-term effects on the environment. Volcanic ash can pollute water sources and soil, which has an impact on the quality of agriculture and public health. Biodiversity is also threatened when animal and plant habitats are destroyed by eruptions. Risk mitigation efforts are a must for the government and society. An early warning system and education for the public regarding emergency response is very important. By understanding the signs of an eruption and how to escape, people can minimize risks to their safety. Increasing research on volcanology in Indonesia is very important. Understanding volcanic activity patterns through the use of modern technology such as satellites can help scientists predict eruptions. With collaboration between government, scientists and society, we can be better prepared to face the risks posed by volcanic eruptions. Managing the impact of volcanic eruptions is a challenge, but with knowledge and preparedness, Indonesians can reduce the risks and impacts posed by this frightening natural phenomenon.