What country of Southeast Asia or the Pacific has most volcanic activity?

Indonesia has the most volcanic activity of any country in Southeast Asia or the Pacific. Indonesia is located on the Pacific Ring of Fire, an area of intense volcanic activity that borders the Pacific Ocean. There are over 17,000 islands in Indonesia, and over 170 of them are volcanically active. The most famous volcano in Indonesia is Mount Merapi, which is located on the island of Java. Mount Merapi is one of the most active volcanoes in the world, and it has erupted over 80 times in the last 100 years.