Major volcanic events that have occurred within the Ring of Fire since 1800 included the eruptions of Mount Tambora (1815), Krakatoa (1883), Novarupta (1912), Mount Saint Helens (1980), Mount Ruiz (1985), and Mount Pinatubo (1991).
Rainwater is the main solution. There would need to be higher technology, to make that happen.
Iron Curtain is the best answer. Hope this helps you!
