Changes in the eruption's show schedule
The volcano used to erupt every half hour on the half hour until midnight. Now, perhaps due to the bigger and more fiery show created a few years back, the volcano erupts only at 8 pm and 9 pm each day, with an additional 10 pm show on Friday and Saturday. Thankfully the show seems to be of the same length and style, for now. Perhaps they'll make it even bigger with the less frequent schedule?