I was stationed at Subic Bay Naval Station when Mt Pinatubo erupted. At that point, the base negotiations were nearly complete. The only sticking point remaining was that the US wanted the new term to be 10 years, PI only wanted it to be 7 years before the next renewal.
After the eruption, the US was no longer as interested because of the predicted cost of the clean up and repairs. The base at Subic had lost over 80 buildings, most collapsed due to the weight of the ash, along with the rains from the super typhoon that also hit at the same time.
The negotiations just fell through after that. It was portrayed by some of the politicians as them “kicking us out,” but that was just for political gain.
Subic was the best liberty port in the Pacific IMHO. It was so friendly and laid back. I would have retired there in 1 more year if the volcano hadn't changed my plans for me. If the bases did open back up, I'd go back to stay.