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Dallol & the salt lake Nov 2009 (Photo: Tom Pfeiffer)

Dallol volcano (Danakil desert, Ethiopia) (7 Albums)

During the Stromboli to Etna tour, Tom and his small group were lucky to be able to watch the 16th paroxysm of the New SE crater of Etna volcano from close range. Despite the bad weather, witnessing the eruption with its incredible sounds is an experience one never forgets. (Photo: Tom Pfeiffer)

Etna volcano photos (14 Albums)

Erta Ale volcano, expedition 02/08 - lava fountains (Photo: Tom Pfeiffer)

Erta Ale volcano (Ethiopia) (5 Albums)

One of the most interesting lava domes in Indonesia when it was still growing. (c)

Kelud volcano (4 Albums)

Eruptions at the Krakatau volcano in November 2010. (Photo: Tom Pfeiffer)

Krakatau volcano (Sunda Strait, Indonesia) - photos (1 Album)

Nyiragongo volcano (DRCongo), Jan 2011: lava lake (Photo: Tom Pfeiffer)

Nyiragongo volcano Jan 2011 (4 Albums)

In August and early September 2011, Stromboli's activity was at unusually strong levels. Powerful explosions from the NE vent often sent bombs to more than 500m high, reaching Pizzo and the Bastimento viewing areas (which remained closed most of the time). Small intracrater lava flows were observed in this period as well. (Photo: Tom Pfeiffer)

Stromboli volcano photos (12 Albums)

Most of the material ejected during its ongoing eruption is ash and blocks from the crater and conduit walls. Incandescent material (i.e. fresh magma) was first observed at Bromo in Dec 2010. Mild strombolian activity was visible at night during our tour from 15-19 Feb, usually accomanied by hissing and soft explosion sounds. At least two different vents were active inside Bromo's crater. Most of the strombolian activity took place from the vent in the W half (right in the pictures) of the crater, while a vent in the eastern half (left) was the principal site of ash emissions and occasional powerful explosions accompanied by loud detonations and shock waves rattling windows in up to several kilometer distance. (Photo: Tom Pfeiffer)

Bromo volcano eruption 2010-2011 (4 Albums)

The Tengger caldera at sunrise (July 2008) (Photo: Tom Pfeiffer)

Bromo & Tengger caldera (East Java, Indonesia) (2 Albums)

Nyamuragira volcano (DRCongo), Kimanura eruption 2011-12: expedition (Photo: Tom Pfeiffer)

Nyamuragira volcano eruption 2011-12 (6 Albums)

Galleries:

Yasur volcano (Tanna Island, Vanuatu), Sep 2010: strombolian activity and ash venting (Photo: Tom Pfeiffer)

Yasur volcano (Tanna Island, Vanuatu), Sep 2010: strombolian activity and ash venting (32 Images)

Our friend Paul Hloben visited the eruption site on 19-20 November (special permit was needed to stay more than one night). A selection of his photos are here. He notes: "The eruption changed from the earlier continuous lava fountaining to almost continuous strombolian-type activity (blasts every second or so). According GVO weekly reports it seems a normal development. This type of activity was exactly what Haroun Tazieff described seeing N-gira in the spring of 1948 in Crateres en Feu: “Every twitch of anger was followed by a brief moment of calm. Brown or blue, the smoke rose in heavy spirals, while a deafening roar, similar to a monstrous hound, rocked the volcano. The nerves had no time to relax, so close was another sudden tremor, another explosion, the return of the incandescence, start of a new volley. The bombs of lava rose with a drone.”
We observed from south (as per Virunga NP blog description). There were definitely 3 craters erupting along the approximately WE fissure (not 100% sure about the direction). There was probably one or 2 more vents spitting lava, difficult to say (as per my video scrutinizing)." (Photo: Paul Hloben)

Nyamuragira volcano (DR Congo) eruption 2011 photos: 19-20 November (15 Images)

Etna volcano (Italy), strombolian activity in October 2006 (Photo: Tom Pfeiffer)

Etna volcano (Italy), strombolian activity in October 2006 (16 Images)

In August and early September 2011, Stromboli's activity was at unusually strong levels. Powerful explosions from the NE vent often sent bombs to more than 500m high, reaching Pizzo and the Bastimento viewing areas (which remained closed most of the time). Small intracrater lava flows were observed in this period as well. (Photo: Tom Pfeiffer)

Stromboli volcano - very strong activity September 2011 (12 Images)

We present a selection of photos taken by Gian Schachenmann who went to the eruption site on 5 Nov as part of one of the first groups to arrive there (contact info: gianms (AT) gmail (DOT) com)
(Photo: Gian Schachenmann)

Nyamuragira volcano (DR Congo): photos of the new eruption Nov 2011 (7 Images)

Lava flows (Photo: Tom Pfeiffer)

Lava flows (99 Images)

Strombolian eruptions (Photo: Tom Pfeiffer)

Strombolian eruptions (101 Images)

Piton de la Fournaise volcano - eruption Okt 2010 (Photo: Sylvie & Philippe Choukroun)

Piton de la Fournaise volcano - eruption Okt 2010 (12 Images)

Eruptions at the Krakatau volcano in November 2010. (Photo: Tom Pfeiffer)

Krakatau volcano eruption Nov 2010 (30 Images)

VolcanoDiscovery stayed on Erta Ale between 25 and 28 November. We were surprised to find the south crater filled with fresh flows, and the lava lake overflowing onto the caldera. The following photos, arranged in chronological order, give an impression of the activity and the changes of the lava lake in the south crater. (Photo: Tom Pfeiffer)

Erta Ale volcano Nov 2010: overflowing lava lake (32 Images)

Bas bubbles bursting on the surface of the lava lake. (Photo: Tom Pfeiffer)

Erta Ale volcano Nov 2010: lava fountains (32 Images)

Erta Ale volcano Nov 2010: lava colors (Photo: Tom Pfeiffer)

Erta Ale volcano Nov 2010: lava colors (34 Images)

Until June 2007, lava was flowing into the sea. Here are some impressions taken during a visit on the island in April 2007. (Photo: Tom Pfeiffer)

Lava flowing into the sea - Kilauea volcano, Big Island April 2007 (50 Images)

Impressions during a volcano tour on Kilauea volcano in Feb. 2005 (Photo: Tom Pfeiffer)

Kilauea volcano (Hawaii), Feb. 2005: erupting hormitos, skylights and lava flows (89 Images)

Spattering from a vent feeding the eastern lava lake. The vent corresponds to the former East Pond vent in Pu'u O'o. During the time the photos were taken, the hornito above the vent collapsed, allowing a view onto the boiling lava. (Photo: Tom Pfeiffer)

Spattering from the East vent in Pu'u 'O'o crater (July 2007) (36 Images)

We present you some photos from the lava lake occupying the eastern part of Pu'u 'O'o crater on Kilauea volcano, Hawaii, taken during 14-20 July 2007. (Photo: Tom Pfeiffer)

Lava lake in Pu'u 'O'o crater (July 2007) (43 Images)

Lava flows in Puka Nui crater, July 2007 (Photo: Tom Pfeiffer)

Lava flows in Puka Nui crater, July 2007 (58 Images)

Overturning lava lake, July 2007 (Photo: Tom Pfeiffer)

Overturning lava lake, July 2007 (38 Images)

Kilauea volcano, July 2007: lava glow (c)

Kilauea volcano, July 2007: lava glow (17 Images)

Stromboli November 2007: new strombolian activity (c)

Stromboli November 2007: new strombolian activity (43 Images)

Anak Krakatau eruption 2007: vulcanian activity (c)

Anak Krakatau eruption 2007: vulcanian activity (32 Images)

Anak Krakatau eruption 2007: strombolian activity (Photo: Tom Pfeiffer)

Anak Krakatau eruption 2007: strombolian activity (35 Images)

Anak Krakatau eruption 2007: details (Photo: Tom Pfeiffer)

Anak Krakatau eruption 2007: details (42 Images)

The most frequent type of activity was ash venting, occuring at intervals of typically 2 minutes, but the resulting plumes were relatively low ash clouds. Some of the more powerful explosions produced tall plumes of over 1 km height. (c)

Anak Krakatau eruption 2007: mostly ash - ash venting and powerful ash plumes (22 Images)

Etna in 1999: eruption of Bocca Nuova (Photo: Tom Pfeiffer)

Etna in 1999: eruption of Bocca Nuova (23 Images)

Etna volcano photos: 2000 (c)

Etna volcano photos: 2000 (20 Images)

One of the most interesting lava domes in Indonesia when it was still growing. (c)

Kelud volcano - growing lava dome (Nov 2007) (18 Images)

Kelud volcano Nov 2007: lava dome (2) (c)

Kelud volcano Nov 2007: lava dome (2) (11 Images)

Kelud volcano Nov 2007: face to face with the lava dome (c)

Kelud volcano Nov 2007: face to face with the lava dome (15 Images)

Kelud volcano Nov 2007: glowing rockfalls (c)

Kelud volcano Nov 2007: glowing rockfalls (20 Images)

Erta Ale volcano expedition Feb 2008: the lava lake (Photo: Tom Pfeiffer)

Erta Ale volcano expedition Feb 2008: the lava lake (16 Images)

Erta Ale volcano expedition 02/08: lava bubbles and fountains at night (Photo: Tom Pfeiffer)

Erta Ale volcano expedition 02/08: lava bubbles and fountains at night (21 Images)

Erta Ale volcano (Ethiopia), lava lake patterns (Feb 08) (Photo: Tom Pfeiffer)

Erta Ale volcano (Ethiopia), lava lake patterns (Feb 08) (20 Images)

During 17-19 January, we managed to stay on top of Lengai with a small group. During much of the time, the summit was in clouds, but on 18 January, the afternoon proved to be clear and Lengai started a phase of ash eruptions lasting from around 4pm to 8pm. A detailed report about the expedition and Lengai's acitivity in the time between 17 and 21 January can be found here. (Photo: Tom Pfeiffer)

Ol Doinyo Lengai volcano (Tanzania) - ash eruptions (18 January 2008) (48 Images)

Nisyros March 2008: the volcano (c)

Nisyros March 2008: the volcano (63 Images)

Stromboli volcano (Italy): eruption photos (Photo: Tom Pfeiffer)

Stromboli volcano (Italy): eruption photos (11 Images)

After the powerful paroxysm at South East Crater on 10 May 2008, a spectacular fissure eruption started on 13 May, opening a 1000 m long, E-W trending fissure starting at the base of the SE crater, and extending into the upper flanks of Valle del Bove.
The activity started with impressive ground deformation where the advancing dike openend the ground, hurling out blocks of older material, some more than tens of meters across. At the fissure, curtains of fire fountains formed from at least 15 vents and produced a fluid lava flow that quickly descended into Valle del Bove. After about one day, the eruption waned quickly to stabilize into mild strombolian activity from a few vents on the upper part of the fissure between 2800 and 2900m.a.s.l. This activity prevailed when our team visited the eruption sites between 15 and 24 May, which is documented in the following photos. (Photo: Tom Pfeiffer)

Etna eruption May 2008: photos (33 Images)

We decided to revisit Anak Krakatau in early July. Its activity of Anak Krakatau was still moderately strong, although individual explosions only occurred at intervals between 1-4 hrs. Generally, eruptions were more ash-rich than in November, these eruptions were rich in ash, with frequent small lightnings in the ash plumes that reached up to about 1 km height. (c)

Krakatau revisited: expedition July 2008 photos (52 Images)

The Tengger caldera at sunrise (July 2008) (Photo: Tom Pfeiffer)

The Tengger caldera at sunrise (July 2008) (22 Images)

A look back to one of the most spectacular eruptions on Etna in recent decades. (Photo: Tom Pfeiffer)

Etna volcano: the great flank eruption in July 2001 (74 Images)