Volcanic Eruption

What is volcanic eruption? It is a phenomenon that happens when material is expelled from a volcanic vent or fissure. Several types of volcanic eruptions have been identified by volcanologists. These are often named after renowned volcanoes where that type of behavior has been discovered. Some volcanoes may exhibit only one characteristic type of eruption during a period of activity, while others may display an entire sequence of types all in one eruptive series. There are three main types of volcanic eruptions. Magmatic eruptions involve the decompression of gas within magma that propels it forward. Phreatic eruptions are driven by the superheating of steam due to the close proximity of magma. This type exhibits no magmatic release, instead resulting in the granulation of existing rock. Phreatomagmatic eruptions are driven by the direct interaction of magma and water, as opposed to phreatic eruptions, where no fresh magma reaches the surface. Within these broad eruptive types are several subtypes. The weakest are Hawaiian and submarine, then Strombolian, followed by Vulcanian and Surtseyan. The stronger eruptive types are Pelean eruptions, followed by Plinian eruptions; the strongest eruptions are called ultra-Plinian. Subglacial and phreatic eruptions are defined by their eruptive mechanism, and vary in strength. An important measure of eruptive strength is the Volcanic Explosivity Index an order-of-magnitude scale, ranging from 0 to 8, that often correlates to eruptive types. Today, I write this because I saw an article today about a volcanic eruption from Semeru volcano, after volcanic eruption from Mount Lewotobi Laki-Laki. So dreadful to look at this news! I am lucky that my country doesn't have volcanic eruption. Anyway, for safety evacuation during volcanic eruption, follow the instructions by the safety crews. Avoid getting into places that are near the volcanoes. Leave things and escape when volcanoes rocks invade own places. Thank you.