Ol Doinyo Lengai volcano, Lake Natron & Lake Manyara: January 2008

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Ol Doinyo Lengai volcano and the Rift Valley in northern Tanzania:

Ol Doinyo Lengai photos by air (September 2007) (c)

Ol Doinyo Lengai photos by air (September 2007) (16 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)

Canadian geologist Philip Benham, one of our participants on the Lengai expedition in Jan 2008 kindly provides us with a selection of his excellent photos: (Photo: Philip Benham)

From Arusha to Lengai volcano: Rift Valley, Lake Natron & the Volcano (tour photos by P. Benham) (92 Images)

Lake Natron, the Rift Valley and Lake Manyara (Jan 08) (Photo: Tom Pfeiffer)

Lake Natron, the Rift Valley and Lake Manyara (Jan 08) (64 Images)

Elephants at Lake Manyara Natl. Park (phtos by P. Benham, tour Jan 08) (Photo: Philip Benham)

Elephants at Lake Manyara Natl. Park (phtos by P. Benham, tour Jan 08) (30 Images)

Lake Manyara Natl Park: game drive (Photo: Tom Pfeiffer)

Lake Manyara Natl Park: game drive (27 Images)

Olmoti crater and the Ngorongoro Highlands (Photo: Tom Pfeiffer)

Olmoti crater and the Ngorongoro Highlands (16 Images)

In Feb. 2007, Ol Doinyo Lengai's summit was characterized by the formation of a large collapse crater and the absense of visible activity. However, magma moving at shallow depths beneath the surface was clearly audible.
A report of this visit can be found here. (Photo: Tom Pfeiffer)

Ol Doinyo Lengai volcano, Feb 2007 (36 Images)

Empakai is an extinct volcano at the northen end of the Ngorongoro Highlands. It has a deep summit caldera with a soda lake famous for its flamingoes who come here during the day. (Photo: Tom Pfeiffer)

Empakai crater (Ngorongoro Highlands): flamingoes, obsidian and stromatolites (32 Images)

Ngorongoro crater: wildlife (Feb 07) (Photo: Tom Pfeiffer)

Ngorongoro crater: wildlife (Feb 07) (32 Images)

Rift Valley & Lake Natron, Feb. 07 (Photo: Tom Pfeiffer)

Rift Valley & Lake Natron, Feb. 07 (43 Images)

Ol Doinyo Lengai, Lake Natron & Ngorongoro Highlands: tour photos (Photo: Tom Pfeiffer)

Ol Doinyo Lengai, Lake Natron & Ngorongoro Highlands: tour photos (83 Images)

The Sidoarjo mud flow (East Java), July 08 (Photo: Tom Pfeiffer)

The Sidoarjo mud flow (East Java), July 08 (23 Images)

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

Nyiragongo volcano (DRCongo), Jan 2011: lava lake (16 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)

Some impressions from our Volcano Expedition to Vanuatu from August 2012. (Photo: Yashmin Chebli)

Vanuatu expedition August 2012 - photos (32 Images)

Night-time lava flows and some impressions (Photo: Tom Pfeiffer)

Pacaya volcano photos (20 Images)

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 (East Java, Indonesia), Feb 2011: strombolian activity (16 Images)

Nisyros March 2008: springtime (c)

Nisyros March 2008: springtime (54 Images)

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 (Italy), SE crater paroxysm nr 16, 8 Oct 2011 (32 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)

Milos Island (Cyclades, Greece) April 2011: spring (Photo: Tom Pfeiffer)

Milos Island (Cyclades, Greece) April 2011: spring (24 Images)

Eifel Excursion 30.8.2008 (Photo: Tom Pfeiffer)

Eifel Excursion 30.8.2008 (23 Images)

Wingertsbergwand: deposits of the Laacher See eruption (East-Eifel, Germany) ca. 10,000 y. B.P. (Photo: Tom Pfeiffer)

Wingertsbergwand: deposits of the Laacher See eruption (East-Eifel, Germany) ca. 10,000 y. B.P. (34 Images)

Ol Doinyo Lengai + Rift Valley

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