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Ol Doinyo Lenai volcano (Tanzania), eruption news: large summit eruption, lava overflows and ash plume (?)

Thu, 6 Sep 2007, 11:47
11:47 AM |
Satellite image of the eruption at Lengai volcano (image: NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team)
Satellite image of the eruption at Lengai volcano (image: NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team)
A large eruption seems to be taking place at Lengai volcano, this time for real: On 4 Sept., reports started coming in that a large (natrocarbonatite?) lava flow is descending the West flank. A considerable ash plume was visible on satellite data.

Over 30 thermal anomalies have been detected by the MODIS team since August 23 - more than during the large eruption in March 2006. On 4 and 5 Sep, the thermal anomaly at the summit was extremely strong. From this and satellite imaginery, it seems that there was a short overflow to the East and a major overflow to the West starting on September 1st (it could be a bush fire on the volcano flank ignited by lava). New overflows on 5 Sep seem to be taking place on the W and NW flanks.

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Source: Matthieu Kervyn De Meerendre, Iniversity of Gent (Belgiim)

Previous news

Wed, 5 Sep 2007, 06:00

Ol Doinyo Lengai volcano (Tanzania) - Smithsonian / USGS Weekly Volcanic Activity Report for 5 September-11 September 2007 (New Activity / Unrest)

An eruption of Ol Doinyo Lengai on 4 September produced an ash plume that was reported by a pilot and visible on satellite imagery. Ashfall lasted about 12 hours in the village of Engare Sero, about 18 km N. Dark areas on the NW, W, and E flanks that were noticeable on satellite imagery from 4 September were possibly due to recent lava flows and burned vegetation or both. ... Read all
Wed, 25 Jul 2007, 06:00

Ol Doinyo Lengai volcano (Tanzania) - Smithsonian / USGS Weekly Volcanic Activity Report for 25 July-31 July 2007 (New Activity / Unrest)

Ol Doinyo Lengai is frequently the scene of fluid but very small volume lava flows in its summit crater, including a few that passed over the crater rim and begun the long descent down the mountain. As noted here last week, news reports had indicated that products of the volcano's 19-July eruption had entered inhabited areas. Subsequent investigations have cast doubt on those earlier claims. ... Read all
Show more
Satellite image of Ol Doinyo Lengai volcano by (c) Google Earth View
Satellite image of Ol Doinyo Lengai volcano by (c) Google Earth View
Stratovolcano 2890 m
Tanzania, -2.75°S / 35.9°E
Current status: minor activity or eruption warning (3 out of 5) Ol Doinyo Lengai volcano eruptions:
1550 BC (?), 50 AD (?), 700 AD (?), 1350 (?), 1880, 1882, 1904, 1907, 1914, 1916, 1921, 1926, 1940, 1954, 1955, 1958, 1960, 1967, 1983, 1994, 2006, 2007-ongoing
Typical eruption style
Explosive activity. In addition, at least during the past +-30 years near-continuous effusion and mildly explosive eruption of natrocarbonatite lava from vents inside the crater, sometimes overflowing over the rim, is taking place.

Ol Doinyo Lengai volcano tours

Crater Highlands & Rift Valley (Tanzania)
The Garden of Eden
10-day trekking and wildlife safari to the Ngorongoro Highlands and the Rift Valley, Tanzania
10 days / 9 nights - Moderate
Price $ 4100
Custom and group dates
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