I could have sworn i read some place that a chain of volcanoes sharing one magma chamber can trigger a multiple eruption as the first volcanoes eruption alleviates the pressure holding everything in place and the drop in pressure causes the gases suspended in the magma to explode and burst out of neighbouring volcanoes. whats your dear lady says she is brighter than both of us?
They suspect it possible but no historical proof to make scientific fact. The other side of the coin is relieving pressure in the chamber lesson the chance of the other connected volcanoes going off so goes the argument.