CNN reports that the volcano has stopped producing ash, and is now releasing only steam. Its temperature has dropped to 100 degrees C.
However, the BBC quotes an expert on the volcano as saying that in the last eruption, in 1821-1823, the starting and stopping went on for 13 months. As well there are still earthquakes under the volcano and activity has not reduced to pre-eruption levels.
Hopefully this fitful behaviour quiets and air travel returns to its previous, fairly reliable state.