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Stratovolcano 1635 m / 5,364 ft
Halmahera, Indonesien, 1.38°N / 127.52°E
: normal / en sommeil
(1 sur 5)
Eruptions du volcan Gamkonora:
1564, 1673 (possibly very large Plinian eruption), 1885, 1911, 1917, 1926, 1949, 1950, 1951, 1952, 1981, 1987
Style éruptif tipique:
Satellite image of Gamkonora volcano (by Google Earth View)
Gamkonora volcano (Indonesia): seismic swarm triggers eruption alert
lun., 27 mai 2013, 14:38
14:38 PM | AUTEUR : T
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.
The 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.
ven., 14 sept. 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). ... lire toutes
dim., 17 juin 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. lire toutes
mar., 17 juil. 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. lire toutes
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