Earthquake: Drop down and take cover under a desk or table. Stay inside until the shaking stops and it is safe to exit. Stay away from bookcases and other furniture that can fall on you. Stay away from windows and light fixtures.
If you are in bed – hold on and stay there.
Volcanic Eruption: Avoid low-lying areas, areas downwind of the volcano, and river valleys downstream of the volcano. Debris and ash will be carried by wind and gravity. Stay in areas where you will not be further exposed to volcanic eruption hazards. Trying to watch an erupting volcano up close is a deadly idea.