There has been news over the last few days of a number of volcanoes in Colombia, so I thought I'd try to gather it up here:
The steaming summit of Nevado del Huila in Colombia
- Nevado del Huila has been ramping up its ash emissions, potentially pointing towards new eruptions from the crater dome. The NASA Earth Observatory posted a new image of the grey ash plume from the volcano poking its way up through the clouds. This plume made it all the way to ~11 km / 36,000 feet, so it definitely isn't insignificant. This comes after an increase in seismicity (up to 1,000 earthquakes in the last week) at the volcano over the past few weeks, suggesting that new magma might be making its way up the conduit. Currently, INGEOMINAS has the alert status at Huila at Orange/II (eruption in days to weeks) according to the Volcano Observatory in Popayan. The current sulfur dioxide flux is up to ~7,400 tonnes/day and a number of explosions have also been registered on the seismometers. You can check out the webcam for the volcano here to see the latest (and the Volcanism Blog has some nice webcam captures of the recent activity.
- There is also a brief article on Hawaii 24/7 by the one of the geologists at HVO on what we're learned from the Nevado del Ruiz lahar in 1985 that killed ~25,000 people in Armero (and the nearby area). It is a nice summary of the events and consequences for those of you unfamiliar with the tragedy that occurred 24 years ago this November 13th.
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More like this
All the news to start the week:
Galeras with a grey ash-and-steam plume behind Pasto, Colombia.
Well, after my article on Friday about Colombian volcanoes, Galeras must have decided it was left out. The volcano has been placed back at alert level Orange/II (eruption in days to weeks). An increase…
The latest news from the world of volcanoes, brought to us by the Global Volcanism Program, USGS and the Smithsonian Institution. They are also brought to us by Sally Kuhn Sennert - and if you have a question for her about her job at the GVP preparing the Weekly Volcanic Activity Report and all…
Has a week gone by already? It is time for another USGS/Smithsonian GVP Weekly Volcano Activity Report.
Highlights (beyond Fernandina, Pagan and Redoubt) include:
A new underwater eruption at NW-Rota 1 in the Mariana Islands.
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A pyroclastic flow from Soufriere Hills heading towards the ocean. Note the large volcaniclastic debris fan being formed by repeated flows. Dated March 2006.
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A brief bit of possible eruption news - there seems to be some submarine volcanic activity at the Reykjanes Ridge, off the Reykjanes peninsula in southwest Iceland:
http://en.vedur.is/earthquakes-and-volcanism/earthquakes/
more detail here:
http://en.vedur.is/earthquakes-and-volcanism/earthquakes/reykjanesridge/
Most of the seismicity was on Sunday 1 November, with a clear decrease as of Monday 2 November 2009.
There is some information (in Icelandic) at the web site of the newspaper Morgunblaðið, which I am not really able to translate, but I think it's about the hypothesis of a submarine eruption:
http://www.mbl.is/mm/frettir/innlent/2009/11/01/ekki_gosoroi_a_reykjane…
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