Clicking the button will toggle the city and trees. You are able to drag the city as close to the volcano as you want. The distance from the volcano affects the amount of damage the city suffers. There is also a day/night cycle. Day is set to 6 am to 7 pm. Night is set to 8 pm to 5 am. A warning sign appears next to the tree button when the city is in danger of the volcano. Pressing R resets city. Pressing SPACE causes the volcano to erupt.
This project simulates a composite cone volcano eruption. These eruptions produce pyroclastic flows, which are super heated gas and rock flowing from the side of the volcano.