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Global Volcanism Program | Image GVP-00441

An ash plume rises above the summit of Karkar volcano in 1979. There are two nested summit calderas at the summit of the forested volcano resulting in a broad, low profile. The 5.5-km-wide outer caldera was formed during one or more eruptions, the last of which occurred 9,000 years ago. The 3.2-km-wide inner caldera was formed sometime between 1,500 and 800 years ago. Most historical eruptions, like this one in 1979, have originated from Bagiai cone within the 300-m-deep inner caldera. Photo by Wally Johnson, 1979 (Australia Bureau of Mineral Resources).

An ash plume rises above the summit of Karkar volcano in 1979. There are two nested summit calderas at the summit of the forested volcano resulting in a broad, low profile. The 5.5-km-wide outer caldera was formed during one or more eruptions, the last of which occurred 9,000 years ago. The 3.2-km-wide inner caldera was formed sometime between 1,500 and 800 years ago. Most historical eruptions, like this one in 1979, have originated from Bagiai cone within the 300-m-deep inner caldera.

Photo by Wally Johnson, 1979 (Australia Bureau of Mineral Resources).

Keywords: caldera | plume | ash | eruption | ash plume


Karkar