VSI personnel visited Dukono in August 1979. Explosive activity had increased since the previous visit 13 months earlier. Ash was ejected every 9-15 minutes but there were no audible detonations.

Further Reference. Kusumadinata, K., 1977, Data on the Dukono volcano: Berita Direktorat Geologi, v. 9, no. 16, p. 183.

Geologic Background. Reports from this remote volcano in northernmost Halmahera are rare, but Dukono has been one of Indonesia's most active volcanoes. More-or-less continuous explosive eruptions, sometimes accompanied by lava flows, occurred from 1933 until at least the mid-1990s, when routine observations were curtailed. During a major eruption in 1550, a lava flow filled in the strait between Halmahera and the north-flank cone of Gunung Mamuya. This complex volcano presents a broad, low profile with multiple summit peaks and overlapping craters. Malupang Wariang, 1 km SW of the summit crater complex, contains a 700 x 570 m crater that has also been active during historical time.

Information Contacts: A. Sudradjat and L. Pardyanto, VSI; D. Shackelford, Brea, CA.