Thursday, Feb 02, 2012
On 25 January CVGHM lowered the Alert Level for Lewotolo from 3 to 2 (on a scale of 1-4) based on decreased seismicity and visual observations during 5-15 January. During 5-15 January fumarolic plumes rose 200-500 m above the summit and incandescence was observed. ... [more]
Monday, Jan 09, 2012
The remote Lewotolo stratovolcano on Lomblen island in Indonesia is getting more and more active, with reports of "black columns of smoke" coming out from its crater, which probably translates to first ash eruptions happening. ... [more]
Lewotolo volcanoLewotolo volcano on the eastern end of a peninsula of Lembata (formerly Lomblen) Island forms a perfect symmetrical cone. The stratovolcano has 2 craters of 900x800 m and 250x200 m in diameter.
Many lava flows have reached the coastline. Historical eruptions, recorded since 1660, have consisted of explosive activity from the summit crater.
Background:Lewotolo's lavas are remarkable because they contain the rare mineral zirconolite (CaZrTi2O7).
"Volatile-induced transport of HFSE, REE, Th and U in arc magmas: evidence from zirconolite-bearing vesicles in potassic lavas of Lewotolo volcano (Indonesia)" Jan C. M. de Hoog and Manfred J. van Bergen, Contributions to Mineralogy and Petrology, Volume 139, Number 4, 485-502