Among the most powerful and destructive natural disasters, volcanic eruptions are catastrophic. They can build and destroy mountains. They can wipe out many villages and towns in a matter of moments. They can even cause global changes in the Earth’s climate. In 1883, the famous Krakatoa eruption send more than 25 cubic kilometers of ash, rock, and pumice into the environment. Heard as far away as 2000 miles, it made the loudest sound ever reported. After it was over, over 165 towns and over 36,000 people were destroyed. In the year after the eruption, the world’s temperature dropped over one degree Celsius, and normal temperatures did not return for another six years.Scientists, who study volcanoes are called volcanologists, are learning how to predict the likelihood and severity of eruptions. But they’re a long way from being able to tell us when a volcano will b fat blocker low its top. While there may be some general signs, like tremors or unusual animal behavior, it is important to understand some basic about the event so that you can prepare to response in an emergency to a volcanic event.1. Become familiar with the terms scientists use to describe volcanoes and volcanic eruptions. That way, you can better understand news reports and information.Volcanic ash is small dust particles and pieces of rock that are erupted into the air with volcanic gases. These ashes are highly acidic and can decompose fabrics, corrode metals, clog machinery, and block water flows. Volcanic ash kills animals and plants. On roofs, it can build up to weights that will cause the building to collapse. Mixed with water, volcanic ask is like cement. It hardens quickly, making breathing deadly.Pyroclastic flows are streams of molten volcanic rock, called lava.