Volcanic activity worldwide 3 Oct 2015: Dukono volcano, Piton de la Fournaise, Ubinas, Aso, Michael, Cotopaxi
Saturday Oct 03, 2015 08:31 AM |
Weak ash plume rising from Aso's Nakadake crater this morning
Glow from Cotopaxi's crater this morning
Ash explosion at Ubinas on Thursday 1 Oct 2015 (INGEMMET webcam)
Aso (Kyushu): After the strong explosion on 14 Sep, the volcano has been rather calm, but continues to emit dilute ash plumes. The volcano remains at level 3 (out of 5) and access to the Nakadake crater closed.
Lava flow field of Piton de la Fournaise's eruption as on 28 Sep 2015(OVPF)
Dukono (Halmahera): Ash emissions from the volcano remain intense, suggesting near continuous ash-venting activity inside the crater. Almost every day, VAAC Darwin reports ash plumes drifting from the volcano as altitudes around 7,000 ft (2.1 km) and extending several tens of kilometers.
Cotopaxi (Ecuador): Visible activity of the volcano has been relatively low during the past week. Only a strong steam plume mixed with low ash contents has been emitted, but there has been a significant change: incandescence has now become visible from the crater. According to scientists from IGEPN, the glow originates from high-temperature gasses. However, this suggests that magma continues to approach the vent, and that the eruption might now be about to become magmatic.
The latter means that the volcano starts to erupt fresh magma, not, only older fragmented material during phreatic (steam-driven) ash explosions as it has been doing so far. According to IGEPN, this could be premonitory of a new eruptive phase characterized by small to moderate explosions that could expel incandescent blocks outside the crater, accompanied by new ash emissions.
Ubinas (Peru): A small explosion occurred at 16:35 local time on 1 October. It generated a small ash plume that rose a few hundred meters and quickly dissipated.
Piton de la Fournaise (La Réunion): The eruption continues with little changes overall. The lava flow field gradually expands (and thickens) towards the southeast from the vents, with the most distant flow fronts now being around 2600-2700 m away.
A slight increase in tremor has been noted over the past week, but volcanologists believe that it is probably due to rainwater infiltration. An inversion of the deformation trend has been detected as well: now, the upper part of the central Dolomieu cone seems to have started to deflate, which could indicate a beginning exhaustion of magma supply.
Michael (United Kingdom, South Sandwich Is): A hot spot has been detected on Saunders Island on MODIS satellite data on 30 Sep. According to the South Sandwich Islands Volcano Monitoring Blog, this is most likely an indicator of volcanic activity on Mount Michael volcano.
The remote South Sandwich Islands in the south Atlantic Ocean lack human activity. A hot spot was previously detected on Saunders Island during the 28th, the 30th, and the 31st August 2015.
Friday, Oct 02, 2015
Thursday, Oct 01, 2015
Sunday, Sep 27, 2015
Friday, Sep 25, 2015
Wednesday, Sep 23, 2015
Piton de la Fournaise (La Réunion): (23 Sep) The eruption continues into its second month,- for Piton de La Fournaise's standards this is an unusually long-lived one. Accompanied by stable tremor, effusive activity remains strong and feeds a growing lava flow field that slowly expands towards the east in direction of the Grandes Pentes. ... [more]