This cool little java applet let's anybody, including novices, simulate an eruption by watching the lava particles shoot up and fall down again. The applet lets you change things like wind velocity, gravity, and lava size so that you can change the way the eruptions look. Simulate a Volcanic Eruption at Volcano World

"Erupt" is a program who's development was sponsored by the United States Government. The program simulates volcanic eruptions and all of the other events associated with them. The simulations are very detailed because variables like erosion, lava flow, type of volcano, prevailing winds, and frequency of eruptions are taken into account. The program can track a piece of land for centuries, causing multiple volcanic eruptions in the same or different places. Download Erupt which was developed by Kehn Wohletz