3. Plinian eruptions are highly explosive and characterized by towering ash columns. Examples include the 79 AD eruption of Mount Vesuvius, the 1980 eruption of Mount St. Helens, and the 1991 eruption of Mount Pinatubo.

1. How does the composition of magma determine whether an eruption will be explosive or effusive?

• Hawaiian volcanoes, like Mauna Loa and Kīlauea, produce mafic magma (basaltic lava), which has low silica content. This makes the lava fluid and allows gases to escape easily, leading to effusive eruptions with lava flows rather than explosions.

• Unlike volcanoes with high-silica magma (such as those in the Ring of Fire), Hawaiian eruptions are generally less violent but can still be destructive due to fast-moving lava.

2. How does understanding different eruption types help in disaster preparedness and risk management for communities living near volcanoes?

• In Hawaii, scientists at the Hawaiian Volcano Observatory (HVO) monitor volcanoes constantly. They track earthquakes, ground deformation, and gas emissions to predict eruptions.

Understanding that Hawaiian eruptions are mostly lava flows helps residents prepare evacuation routes and protect property. The 2018 Kīlauea eruption, for example, destroyed homes but had warnings in advance.

3. What real-world volcanic eruptions can be compared to the model you’ve created?

• The model shows fluid lava flows, it compares to Kīlauea’s 2018 eruption or Mauna Loa’s 2022 eruption.

Hawaiian volcanoes are a great example of shield volcanoes, where eruptions are frequent but usually effusive rather than explosive.