Ol Doinyo Lengai volcano news and activity updates:
Ol Doinyo Lengai volcano (Tanzania), activity update: volcano calming down, further investigations under way
mar., 11 sept. 2007, 08:1708:17 AM |
As more evidence about the large eruption at Lengai volcano on 4-5 Sep is pieced together, it appears that the eruption was probably a mainly explosive event while evidence of significant lava flows on the flanks becomes less. The observed "lava flows" could have been bush fires ignited by hot ejecta. In any case, there is little doubt that the observed ash cloud was the result of a significant explosive eruption and not just landslides on the steep flank.
In the meanwhile, the mountain has calmed down and only weak thermal anomalies are being detected on the summit. It would be imprudent to say that the eruption is over. If this is indeed the start of a major explosive cycle, more eruptions could follow in the next weeks and months. Field investigations are under way.
jeu., 6 sept. 2007, 18:39
It seems that the eruption at Lengai is indeed a major event and that explosive activity has taken or is taking place in addition to lava flows and probably, bush fires. According to local sources from the nearby Moivaro - Lake Natron Camp, Lengai first erupted at midnight and at 6 am on 4 September. A pilot reported ash rising to 20,000 ft (ca. 6 km). Ashfall was reported from Engaresero Village, but there are no reports on injuries or fatalities. The highly regarded Moivaro Tented Lodge near Lake Natron has been temporarily evacuated. lire toutes
jeu., 6 sept. 2007, 11:47
Ol Doinyo Lenai volcano (Tanzania), eruption news: large summit eruption, lava overflows and ash plume (?)
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.... lire toutes
lun., 23 juil. 2007, 01:46
As more news has become available, the news about an effusive flank eruption at Lengai around 15 July turns out to be probably false. The observed "ashcloud" was dust from a landslide. This demonstrates how difficult it is in this area to have robust information. The ongoing seismic activity in the Gregory Rift, however, is quite peculiar. lire toutes
jeu., 5 avril 2007, 20:51
Thomas, our correspondant in Arusha climbed Lengai last week and reports indirect signs of activity near the western rim of the crater, at the place where lava overflowed in the March 2006 eruption. this is his report: ... lire toutes
mar., 20 févr. 2007, 16:16
During our latest expedition to the active crater of Lengai volcano from early 31 Jan - 2 February 2007, no eruption of natrocarbonatite lava occured from the summit vents. According to local Maassai guides, the central area of the crater with the large collapse pit near the tall hornito T49b had not seen significant changes since last summer. From an open vent in the NE corner at the bottom of the pit at the base of the hornito, loud washing-machine like sounds of boiling lava was audible all the time. A large pool of lava must be found somewhere at very shallow depths in some caverns beneath that area. This assumption is confirmed by the glow of lava that was clearly visible one night from a second, smaller vent located about 30 m south of the large vent in the base of the collapse pit. One guide confirmed he had seen spattering of lava from this vent some two weeks earlier. lire toutes