The Ubinas, near Arequipa, in Peru, issued twice significant amounts of ash, yesterday September 21, 2015, at 9:14 and 10:17 a.m. respectively. The plumes are mounted at 1500 and 1400 meters above the crater before spreading over 10 km towards S-SE. Ash fallout are reported on Querapi, Ubinas, Tonohaya, Sacohaya, Anascapa and San Miguel.
The INGEMMET had expected an explosion and emission of ash in view of thermal and seismic parameters, suggesting an obstruction of the volcanic conduit.
Source: OVI / INGEMMET
The situation at the Piton de la Fournaise is stable, with all indicators at high levels, as indicated in the deferred bulletin issued by OVPF:
" On the site eruptive:
- Fountains are much less frequent and less high
- The eruptive cone reaches 25-30 meters high
- The level of the lava lake sank quickly into the night of Thursday 17 to Friday 18
- Many ephemeral mouths are open and are still open on the length of / tunnel (s) close (50m) and away (500 to 700m) of assets vent. In the night of Thursday (17) to Friday (18) a long arm of flow was set up towards the wall at about 500 m east of the one that was formed on August 24.
- From the eruptive vent, escape:
* (I) a large amount of SO2 in a plume which rotates with the wind and sometimes rises beyond 3,000 m;
* (Ii) a thick white plume. It is located at the location of one of two wells which formed the eruptive cone. This closes gradually by edifying. The white color of this characteristic plume of water vapor;
* (Iii) sometimes much darker plume. The cone in formation is high and relatively unstable in its upper part. The wall collapses are not uncommon. It is they that cause these dark plumes. "
Source: OVPF / IPGP
The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite acquired this natural-color image of the plume on September 20, 2015. Red outlines indicate hot spots where the sensor detected unusually warm surface temperatures - doc. NASA EO
False alarm at Mount Meru where ash plume was spotted by satellites and passenger airliners.
The origin of the plume was confirmed as being connected to a fire, in the absence of seismic activity and detecting SO2 in the plume, and since the eccentric position.
- Nasa Earth Observatory
- KTN News Kenya – Mt. Meru in Tanzania on fire
- Eruptions / blog d'E.Klemetti