Hi Andrea, Andesite is the most common type of magma produced at subduction zones. 3,000 feet might be enough if it was a lava flow or lahar and you were upslope or if it was pyroclastic flows and you were upwind and in an airplane.
Every volcano is a little different and the exact nature of the eruption depends on many variables.
Error on the side of caution. Listen to the volcanologists and civil defense people.