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 The 1635 m high stratovolcano fo Gamkonora is the highest peak on Halmahera.
It has had shifting shifting eruption centers that have produced an elongated series of summit craters along a N-S trending rift. Young-looking lava flows originate near the cones of Gunung Alon and Popolojo, south of Gamkonora.
Since its first recorded eruption in the 16th century, Gamkonora has typically produced small-to-moderate explosive eruptions. Its largest historical eruption, in 1673, was accompanied by tsunamis that inundated villages and killed many people.
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Source: GVP, Smithsonian Institution Stratovolcano 1635 m / 5,364 ft
Halmahera, Indonesia, 1.38°N / 127.52°E Current status: normal or dormant (1 out of 5)| ReportsGamkonora volcano booksGamkonora volcano eruptions:1564, 1673 (possibly very large Plinian eruption), 1885, 1911, 1917, 1926, 1949, 1950, 1951, 1952, 1981, 1987, 2007, 2013 Typical eruption style:Explosive. Last earthquakes nearbyLatest satellite images 
 Satellite image of Gamkonora volcano (by Google Earth View) Wed, 11 Nov 2015, 17:13
PVMBG reported that observers at the Gamkonora observation post in Gamsungi (6 km NW), West Halmahera, reported that during 1 August-3 November diffuse white plumes rose up to 70 m above the crater rim. ...moreRSAM values fluctuated; an increase was detected in October coincident with a period of increased tremor. The Alert Level was lowered to 2 (on a scale of 1-4) on 1 July. Residents and tourists were asked not to venture near the crater within a radius of 1.5 km. (Smithsonian / USGS Weekly Volcanic Activity Report 4-10 November 2015) [ less] [ read all] Mon, 27 May 2013, 14:38 Increased earthquake activity has triggered an eruption alert by VSI, who raised the volcano's status to 3 ("Siaga", "warning") out of 4 this morning. Indonesian volcanologists reported that the degassing plume from the summit crater of the volcano has turned dark, which suggests the presence of ash (probably phreatic in origin) since 25 May. ...moreThe seismicity has shown significant changes with the appearance of harmonic tremor, low-frequency "tornillo" type-earthquakes (known from Galeras volcano in Colombia to often precede explosions). Volcanic-tectonic quakes (VA-type) related to rock fracturing have increased a lot, suggesting that magma at depth is intruding into new dykes. No ash plumes have been detected on satellite images. The last activity of Gamkonora goes back to January, when it produced some small phreatic explosions. [ less] [ read all] Fri, 14 Sep 2012, 10:05 CVGHM reported that on 7 September the Alert Level for Gamkonora was lowered from 3 to 2 (on a scale of 1-4). Sun, 17 Jun 2012, 08:30 The alert level of Gamkonora volcano on the island of Halmahera, Indonesia, was raised to 3 (eruption warning) on 13 June, following an increase in seismic activity and steaming. ...moreThe Indonesian Volcanological Survey recommends a safety zone of 3 km radius around the volcano. [ less] Tue, 17 Jul 2007, 19:25 After last week's intense ash eruptions generating plumes 2-3 km high, Gamkonora volcano has quieted down over the past days. Since July 13, seismicity has decreased sharply and no new larger ash eruptions have occurred since then.The Indonesian Volcanological Survey has lowered the alert level and many villagers who had been evacuated from the slopes of the volcano have returned home. ...more---
Source: AFP, VSI [ less] More on VolcanoDiscovery:
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