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Diaporama
Ibu volcan
Stratovolcano 1325 m / 4,347 ft
Halmahera, Indonesia, 1.48°N / 127.64°E
Condition actuelle: en éruption (4 sur 5)
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Eruptions du volcan Ibu:
1911, 1998, 2001, 2004
Style éruptif tipique:
Explosive
Derniers séismes proches
Voyages au volcan Ibu
Volcans et Épices (17 jours de trekking sur les volcans de la mer des Moluques: N-Sulawesi, Karangetang et Halmahera)

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Ibu volcano news

Ibu volcano (Halmahera, Indonesia) activity update & field observations: mild to moderate explosive activity at lava dome

vendredi nov. 14, 2014 03:03 | AUTEUR : T

Strombolian eruption from a vent in the center of Ibu's lava dome
Strombolian eruption from a vent in the center of Ibu's lava dome
The cinder cone in the center of Ibu's lava dome
The cinder cone in the center of Ibu's lava dome
When observed during 12-13 Nov, there was frequent mild to moderate explosive activity from at two different vents in the center of the lava dome.
No activity was observed at the lava dome itself. The vent to the south is surrounded by a recent-looking cinder cone, about 30 m tall and 60 m wide, and produced likely phreatomagmatic explosions at intervals of 20-30 mintues. These typically seemed to start from a cluster of vents inside the cone's crater, ejecting dense white steam as well as gray ash plumes, sometimes followed by dense black tephra jets reaching 10-20 m in height. Sometimes, the ash plumes collapsed to form small pyroclastic flows running down the western slope of the cone. At night, weak incandescence could be seen and only few glowing blombs were ejected during these eruptions.
The sencond vent to the north of the cinder cone had typical strombolian explosions which ejected many incandescent lava bombs to 100-200 m height and produced billowing ash plumes rising up to 500 m.
A possibly third vent in the same area of the second one often had phases of intense degassing that lasted several minutes with increasing strength. Accompanied by loud jet-engine like sounds, a dense steam plume was erupted, followed by dilute ash at the end of the degassing event.
The most recent lava flow was if at all very weakly active. No incandescence or movement was visible, only a few rockfalls at the probably last active front at the break-in-slope between the crater breach and the deep gully that cuts the crater on the northern side. It apparently had originated from the second vent area and spilled into northern ravine, like a number of previous lava flows.
Actualités précédentes
ASTER satellite image on google map showing Ibu's lava flow on 5 Sep (image: Culture Volcan)
jeudi, oct. 16, 2014
A viscous lava flow continues to be active on the northern flank of the volcano. The flow, similar to the one currently active at Santiaguito volcano in Guatemala, starts as an overflow from the lava dome in the crater, and forms a lobe traveling through a breach of the crater rim into a ravine extending north of the volcano. ... [details]
MODIS hot spots at Ibu volcano (MODVOLC, Univ. Hawaii)
lundi, juil. 28, 2014
New thermal signals have been detected recently coming from the northern rim of the volcano's summit crater, suggesting that the volcano has entered a phase of increased activity. ... [details]
MODIS hot spot at Ibu volcano (ModVolc, Univ. Hawaii)
dimanche, mars 30, 2014
Activity (effusive / explosive) continues at the volcano, which has an active lava dome. A new MODIS hot spot is visible on satellite data, suggesting this has recently increased. [details]
mardi, févr. 25, 2014
A thermal anomaly remains visible at the volcano on satellite data, suggesting that there is some sort of ongoing eruptive activity. This could likely be from a slowly growing lava dome. [details]
MODIS hot spot data (past 7 days) for Ibu volcano (ModVolc, Univ. Hawaii)
mercredi, oct. 23, 2013
Hot spots at the summit have become larger and more frequently observed on recent MODIS satellite data. This indicates that activity has become more intense at the volcano with its active lava dome. [details]
 

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