So you want the rain falling, the clouds moving with the rain, the water rushing along the ground, the magmatic infusion ebbing and flowing, the hot spring and steam vent spewing steam, the arrows moving in the directions prescribed, and the seismic shift of the ground, all in concert with one another?
You'll need computations of each physical phenomenon, such as rain falling, clouds moving and morphing, how water flows, the magmatic ebb and flow and the other items mentioned. Once all these computations are done, we can talk about animation. Each individual physical change can be in a set of zones, but you'll need about 30 time steps such that the motion is repeated after each cycle of 30, unless you want slower movement, in which case you'll need a couple hundred time steps for each. We can then talk about how to animate each physical feature.
Aerospace Research Engineer
NASA Langley Research Center