Question: Very geologically active region with many earthquakes and volcanoes?
Disambiguated questions and answers: question: Very geologically active region near Jupiter with many earthquakes and volcanoes?
Very geologically active region on the Earth with many earthquakes and volcanoes?
answer: Io
Jupiter I
The Ring of Fire
Rim of Fire
the Rim of Fire
the Circum-Pacific belt
Ring of Fire
Circum-Pacific belt
Natural Questions answer: Ring of Fire (from the Wikipedia article "Ring of Fire")