Batu Tara volcano 30 June - 4 July 2015: eruptions

During our Batu Tara volcano expedition we stayed on the island from 30 June - 4 July 2015 and found the volcano in similar activity (strombolian) as during our other visits in Nov 2012 and 2014. However, during the night 2-3 July and early on 3 July, a phase of increased activity resulted in the formation of small pyroclastic flows caused by collapsing material ejected during the explosion and/or accumulated on the crater rim.
See also: Expedition, camp & volcano | Video clips of eruptions
A typical small eruption at Batu Tara. (Photo: Tom Pfeiffer)
A typical small eruption at Batu Tara. (Photo: Tom Pfeiffer) [info]
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In the evening, the glowing bombs become visible. (Photo: Tom Pfeiffer)
In the evening, the glowing bombs become visible. (Photo: Tom Pfeiffer) [info]
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Strombolian eruption in moonlight. (Photo: Tom Pfeiffer)
Strombolian eruption in moonlight. (Photo: Tom Pfeiffer) [info]
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A stronger eruption sends many bombs against and over the vertical eastern crater wall. (Photo: Tom Pfeiffer)
A stronger eruption sends many bombs against and over the vertical eastern crater wall. (Photo: Tom ... [info]
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Small strombolian explosion in moonlight. (Photo: Tom Pfeiffer)
Small strombolian explosion in moonlight. (Photo: Tom Pfeiffer) [info]
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Strong strombolian eruption with many ejections to the western side. (Photo: Tom Pfeiffer)
Strong strombolian eruption with many ejections to the western side. (Photo: Tom Pfeiffer) [info]
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Moderate explosion and ash plume rising a few hundred meters. (Photo: Tom Pfeiffer)
Moderate explosion and ash plume rising a few hundred meters. (Photo: Tom Pfeiffer) [info]
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The wind carries the ash plume from an eruption over to the west. (Photo: Tom Pfeiffer)
The wind carries the ash plume from an eruption over to the west. (Photo: Tom Pfeiffer) [info]
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Rising ash plume drifting over the western crater wall. (Photo: Tom Pfeiffer)
Rising ash plume drifting over the western crater wall. (Photo: Tom Pfeiffer) [info]
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Powerful eruption and curtains of falling scoria and bombs. (Photo: Tom Pfeiffer)
Powerful eruption and curtains of falling scoria and bombs. (Photo: Tom Pfeiffer) [info]
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Rockfalls on the sciara of Batu Tara. (Photo: Tom Pfeiffer)
Rockfalls on the sciara of Batu Tara. (Photo: Tom Pfeiffer) [info]
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Strong eruption in twilight. (Photo: Tom Pfeiffer)
Strong eruption in twilight. (Photo: Tom Pfeiffer) [info]
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Strong eruption at night (Batu Tara volcano, Indonesia) (Photo: Tom Pfeiffer)
Strong eruption at night (Batu Tara volcano, Indonesia) (Photo: Tom Pfeiffer) [info]
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Small strombolian activity. (Photo: Tom Pfeiffer)
Small strombolian activity. (Photo: Tom Pfeiffer) [info]
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Red glow reflected in cloud hovering over the crater. (Photo: Tom Pfeiffer)
Red glow reflected in cloud hovering over the crater. (Photo: Tom Pfeiffer) [info]
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On the evening of 2 July, a strong eruption, particularly rich in ejecta occurs and causes a pyroclastic flow (next images). (Photo: Tom Pfeiffer)
On the evening of 2 July, a strong eruption, particularly rich in ejecta occurs and causes a pyrocla... [info]
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Pyroclastic flow traveling down the sciara and approx. 50 m over water. The flow took approx. 30 seconds to reach the sea, i.e. travelled at approx. 30 m/s. (Photo: Tom Pfeiffer)
Pyroclastic flow traveling down the sciara and approx. 50 m over water. The flow took approx. 30 sec... [info]
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Rising ash plume from the stagnating flow front. (Photo: Tom Pfeiffer)
Rising ash plume from the stagnating flow front. (Photo: Tom Pfeiffer) [info]
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Wide-angle view of a normal-sized eruption. (Photo: Tom Pfeiffer)
Wide-angle view of a normal-sized eruption. (Photo: Tom Pfeiffer) [info]
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Powerful eruption with incandescent rock falls traveling down the sciara. (Photo: Tom Pfeiffer)
Powerful eruption with incandescent rock falls traveling down the sciara. (Photo: Tom Pfeiffer) [info]
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Glowing rock falls on the sciara of Batu Tara. (Photo: Tom Pfeiffer)
Glowing rock falls on the sciara of Batu Tara. (Photo: Tom Pfeiffer) [info]
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On the morning of 3 July, another strong explosion causes a small pyroclastic flow. (Photo: Tom Pfeiffer)
On the morning of 3 July, another strong explosion causes a small pyroclastic flow. (Photo: Tom Pfei... [info]
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Small pyroclastic flow traveling down the sciara at 20-30 m/s speed. (Photo: Tom Pfeiffer)
Small pyroclastic flow traveling down the sciara at 20-30 m/s speed. (Photo: Tom Pfeiffer) [info]
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View of the sciara where a pyroclastic flow has descended. (Photo: Tom Pfeiffer)
View of the sciara where a pyroclastic flow has descended. (Photo: Tom Pfeiffer) [info]
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Strong eruption. (Photo: Tom Pfeiffer)
Strong eruption. (Photo: Tom Pfeiffer) [info]
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Rock falls on the sciara. (Photo: Tom Pfeiffer)
Rock falls on the sciara. (Photo: Tom Pfeiffer) [info]
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Dust on the sciara from rockfalls reaching the shore. (Photo: Tom Pfeiffer)
Dust on the sciara from rockfalls reaching the shore. (Photo: Tom Pfeiffer) [info]
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Close-up of an explosion. (Photo: Tom Pfeiffer)
Close-up of an explosion. (Photo: Tom Pfeiffer) [info]
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A large lava bomb is ejected during this eruption. (Photo: Tom Pfeiffer)
A large lava bomb is ejected during this eruption. (Photo: Tom Pfeiffer) [info]
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Another strong eruption at night, throwing out a meter-sized bomb (thick trail leaving the vent to the right side). (Photo: Tom Pfeiffer)
Another strong eruption at night, throwing out a meter-sized bomb (thick trail leaving the vent to t... [info]
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Rockfalls on the sciara at night. (Photo: Tom Pfeiffer)
Rockfalls on the sciara at night. (Photo: Tom Pfeiffer) [info]
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View of an eruption from the beach at low tide. (Photo: Tom Pfeiffer)
View of an eruption from the beach at low tide. (Photo: Tom Pfeiffer) [info]
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Glow from this eruption reflects on the sea. (Photo: Tom Pfeiffer)
Glow from this eruption reflects on the sea. (Photo: Tom Pfeiffer) [info]
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Trails of glowing rockfalls from the eruption in the previous picture. (Photo: Tom Pfeiffer)
Trails of glowing rockfalls from the eruption in the previous picture. (Photo: Tom Pfeiffer) [info]
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The sciara is black after a morning rain. (Photo: Tom Pfeiffer)
The sciara is black after a morning rain. (Photo: Tom Pfeiffer) [info]
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Good-by eruption on the morning of 4 July, before leaving Komba Island. (Photo: Tom Pfeiffer)
Good-by eruption on the morning of 4 July, before leaving Komba Island. (Photo: Tom Pfeiffer) [info]
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