The steep stratovolcano of Lengai volcano seen from the plain of the Rift Valley. (Photo: Tom Pfeiff...
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Philip and our Maassai guide Peter examining one of the many fresh impacts on the southern slope of ...
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The new ash cone is occupying all of the north crater. None of the former hornitos is there any more...
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Zoom onto the crater walls. (Photo: Tom Pfeiffer)
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Ash falls from eruptions during the past weeks have been concentrated in a sector west of the volcan...
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The crater of the new ash cone on Lengai volcano. Most of the time, a very fine, dilute stream of sm...
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A small group of climbers, perhaps unaware of their dangerous position, have climbed via the old nor...
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The group from before is trying to descend back along the old route, but will have to give up: the s...
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The group is crossing the crater,- they are just tiny spots in the picture. (Photo: Tom Pfeiffer)
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The south crater, now a desolate expanse of ash with all vegetation killed... Our tent is on its rim...
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Shortly after the small group has crossed the crater floor, bluish gas exits the crater and a minute...
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Pulsating fingers of ash and blocks erupting silently from the crater. (Photo: Tom Pfeiffer)
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An hour after the first explosions, the activity increases. Blocks and the finger-like initial ash j...
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Feb 2007, one year earlier, the same view onto the north crater from the summit. The crater famous f...
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Wind is bending the erupted ash plumes. (Photo: Tom Pfeiffer)
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Peter and Philip watching the activity. The ash cloud is drifting to the west, making it rain more a...
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The eruptions are at their peak now and luckily, the ash plume is drifting to the side of us. Otherw...
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Philip, fully concentrated, taking photos. (Photo: Tom Pfeiffer)
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Even our guide Peter seems to be impressed and is following the activity closely. (Photo: Tom Pfeiff...
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Billowing ash clouds. (Photo: Tom Pfeiffer)
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Light and shadow in the ash cloud. (Photo: Tom Pfeiffer)
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CLose-up of the ash fingers: blocks, often made of ash themselves and disintegrating during flight, ...
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After the initial kinetic energy is consumed, the ash is taken by wind turbulence, creating curling ...
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Eruptions jetting into the ash clouds already obscuring the crater. (Photo: Tom Pfeiffer)
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Dance of ash curls and hundreds of small blocks thrown into the air... (Photo: Tom Pfeiffer)
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The ash eruptions become almost continuous. By the time a new jet erupts, the ash and falling blocks...
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Lake Natron in the background as well as numerous (wet) clouds in the distance. We were lucky to hav...
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Ash is raining out of the dark ash cloud. (Photo: Tom Pfeiffer)
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200 m high ash cloud. (Photo: Tom Pfeiffer)
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300+ m high ash cloud... (Photo: Tom Pfeiffer)
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(Photo: Tom Pfeiffer)
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Erupting jets of ash drawing thick fingers of ash. (Photo: Tom Pfeiffer)
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Crop from the previous image showing details of the ash jets, mostly created by disintegrating ash b...
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Ash eruptions at their peak during 18 Jan 2008. (Photo: Tom Pfeiffer)
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Weakly smoking Lengai volcano seen from the plain of the Rift Valley near Lake Natron. (Photo: Tom P...
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Lengai and the typical cloud around its summit seen in moonlight. (Photo: Tom Pfeiffer)
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The western ridge leading from the summit to the north crater. The escarpment of the Rift Valley in ...
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Ash deposits and erosions channels on the plaine and Rift Valley escarpment to the west of Lengai. (...
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Erosion gullies in the ash-covered plain west of Lengai volcano. (Photo: Tom Pfeiffer)
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The rim of the ash cone in Lengai's crater. (Photo: Tom Pfeiffer)
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View onto Lake Natron seen from the summit of Lengai. (Photo: Tom Pfeiffer)
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Maassai guide Peter observing the eruptions at Lengai volcano. (Photo: Tom Pfeiffer)
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Two ash plumes from powerful ash eruptions one shortly after the other. (Photo: Tom Pfeiffer)
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The ash-covered steep slope of Lengai with its deep erosion gullies. (Photo: Tom Pfeiffer)
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As we leave Lengai on 21 January and drive past Kerimasi volcano, a last view on now distant Lengai ...
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The plain on the NE of Lengai with Gelai volcano and its many flank cones seen from the path up to L...
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On the first (easy) part of the new climb to Lengai. (Photo: Tom Pfeiffer)
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Philip and Peter on the summit of Lengai and ash from an eruption. (Photo: Tom Pfeiffer)
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