In April 2018, an eruption of the Kilauea volcano in Hawaii started. The activity continued for months, with impressive lava flows that cut roads and even covered houses and entire neighbourhoods (Figure 1), forcing the evacuation of thousands of people. Fortunately, it did not take any life. Some weeks later, on June 3rd, Fuego volcano, in Guatemala, shocked the international community with a shorter, but certainly more violent, eruption. The eruption of Fuego volcano, probably less known than Kilauea, affected near two millions of people and sadly caused 190 verified deaths and 238 missing persons.
The main reason why Fuego’s eruption was more deadly than the Kilauea’s one is the type of activity. They are different types of volcanoes with different eruptive dynamics and thus different related hazards. Kilauea is a shield volcano and it is formed by a sequence of eruptions of very low viscous magma. The magma reaches the surface and is generally erupted in an effusive way generating lava flows, really hot mixtures of molten rock, crystals and gas emitted from the volcanic vent, able to reach several meters per second and kilometers of length, literally looking like rivers (such as in this video). These lava flows can be sometimes accompanied by weak to mild explosive activity in the form of lava fountains. [Read More]