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LadyPakal

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    Iceland's Eyjafjallajokull Volcano - Discussion Thread

    in Space, Science & nature

    Posted · Edited by LadyPakal

    I love this quote "It's the CAA's job to ensure the public is kept safe by ensuring safety decisions are based on scientific and engineering evidence; we will not listen to those who effectively say 'let's suck it and see'."

    Here's a list of volcanic eruptions that have caused large amounts of deaths. http://www.infoplease.com/ipa/A0197833.html

    The present volcano hasn't been in this class. So a large amount of deaths isn't quiet right which is why I thought you were referring to the Laki eruption. The present eruption also contains fluorine so a few deaths could well occur again.

    I thought airports over the north of the UK were closed so how come flights are going Glasgow etc???

    Did you miss the 'both human & livestock' part of my original post? Maybe I misread the human part but livestock certainly died. Anyway, in a place with a relatively small population, 'a lot' may not be considered 'large' outside of it.

    Aberdeen is open still. Nothing seems to shut it these days and I was so looking forward to a peaceful weekend. *sigh*

    On twitter: Confirmation from NATS that Aberdeen will remain open until at least midnight (Sun). For specific flight info go to www.aberdeenairport.com

    Iceland's Eyjafjallajokull Volcano - Discussion Thread

    in Space, Science & nature

    Posted

    I think you referring to the Laki eruption rather than this volcano's previous eruption.

    Nope: http://en.wikipedia.org/wiki/Eyjafjallaj%C3%B6kull

    'Some damage was caused by a minor eruption in 1821.[10] Notably, the ash released from the eruption contained a large fraction of fluoride, which in high doses may harm the bone structure of cattle, horses, sheep and humans. The eruption also caused some small and medium glacier runs and flooding in nearby rivers Markarfljót and Holtsá. The eruptive phase started on 19 and 20 December 1821 by a series of explosive eruptions and continued over the next several days. The sources describe heavy ash fall in the area around the volcano, especially to the south and west.

    After that event the sequence of eruptions continued on a more subdued level until June 1822.

    From the end of June until the beginning of August 1822, another sequence of explosive eruptions followed. The eruption columns were shot to considerable heights, with ashfall in both the far north of the country, in Eyjafjörðyour, and in the southwest, on the peninsula of Seltjarnarnes near Reykjavík.

    The period from August to December 1822 seemed quieter, but farmers attributed the death of cattle and sheep in the Eyjafjörðyour area to poisoning from this eruption, which modern analysis identifies as fluoride poisoning. Some small glacier runs occurred in the river Holtsá. A bigger one flooded the plains near the river Markarfljót. The sources don’t indicate the exact date.

    In 1823, some men went hiking up on Eyjafjallajökull to inspect the craters. They discovered a fissure vent near the summit caldera a bit to the west of Guðnasteinn.

    In early 1823, the nearby volcano Katla under the Mýrdalsjökull ice cap erupted and at the same time steam columns were seen on the summit of Eyjafjallajökull.'

    Extract from that article, Richard Branson speaking, Quote:-

    "We need strong leadership to intervene to avoid doing further unnecessary damage to the UK economy and lives of travellers."

    For "UK economy" read "Branson economy"! I haven't noticed that the closures have done damage to the economy, wasn't that already done by the recession?

    It seems to me the government is showing more concern for the lives of travellers than Branson is.

    I think all of these airline bosses should have to send one member of their family out every day on one of their scheduled flights - preferrably their children. Let's see how 'unnecessary' the bans are then.

    Iceland's Eyjafjallajokull Volcano - Discussion Thread

    in Space, Science & nature

    Posted

    Wikipedia has an entry on volcanic ash (including some hastily added stuff about the 2010 closure of Europe etc...): http://en.wikipedia.org/wiki/Volcanic_ash

    From this: ' Volcanic ash particles have a maximum residence time in the troposphere of a few weeks. The finest tephra particles remain in the stratosphere for only a few months, they have only minor climatic effects, and they can be spread around the world by high-altitude winds. This suspended material contributes to spectacular sunsets. The major climate influence from volcanic eruptions is caused by gaseous sulfur compounds, chiefly sulfur dioxide, which reacts with OH and water in the stratosphere to create sulfate aerosols with an residence time of about 2–3 years.'

    Iceland's Eyjafjallajokull Volcano - Discussion Thread

    in Space, Science & nature

    Posted

    No I very much doubt it. apparently this helicorder picks up tremors from Eyjafjallajokul so that should be what it is recording unless of course it is strong wind signals which are a possibility. Don't know though if the wind is that strong where it is sited or not.Checking it again it seems to be unusual signals so could pssibly be wind, if not something very unusual is happening I would have thought.

    It is wind - there is a link at the bottom of the helicorder page that show the wind speed in the area of the recorder & the guy who set it up has said it is wind noise.

    Iceland's Eyjafjallajokull Volcano - Discussion Thread

    in Space, Science & nature

    Posted

    This is all Aberdeen airport has to say about it:

    'The volcanic ash cloud coming from Iceland continues to cause occasional disruption to air traffic around Europe.

    All of BAA's airports are open, and normal schedules are in place. However, there may be delays to transatlantic services, and some airlines have cancelled flights.

    Please contact your airline, or check its website for updates. We thank you for your patience.

    For breaking news, you can follow us on Twitter www.twitter.com/ABZ_Airport.'

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