Diamond Head is part of the Ko'olau Range. ... The vents are now extinct and Diamond Head has been dormant for about 150,000 years. Diamond Head is believed to be monogenetic, meaning the eruption only occurs once. Therefore, geologists believe that Diamond Head will never erupt again.

Is the Diamond Head a volcano?

Although Diamond Head is listed as a dormant volcano, it is considered monogenic, meaning it was a one-blast wonder and will probably never awaken again. It was designated a National Natural Landmark in 1968 as an excellent example of a tuff cone (Volcano Cafe). Yours truly at Diamond Head, Oahu.

When was the last time Diamond Head volcano was active?

Diamond Head is monogenetic, which means eruption occurs only once. The last eruption of the volcanic tuff cone was likely 150,000 to 200,000 years ago. It has remained dormant since.