Question: are the volcanoes on oahu active?
Answer: IS THERE A VOLCANO IN WAIKIKI? A volcano commonly known as Diamond Head grandly presides over Waikiki, the world-famous mecca for tourists in the state capital of Honolulu. It's one of several volcanic craters on Oahu that scientists believe were formed between 40,000 and 500,000 years ago. ... No Oahu volcano is active.