Argyllcraig
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Posts posted by Argyllcraig
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That PV wouldnt be too bad if we can get some good polar maritime flow from it. (Im thinking in a Scottish Skiing sense)
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Snow now showing up on the ski resort cams
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Some snow over the Scottish tops today, a lot more to come for the weeks end
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Agree with you SS.. if memory serves me has the set up for the last two winters not also been like this? Pretty active Atlantic then somewhere towards the latter part of November its pretty much just switched off in the last 2 years with the jet going south. Fingers crossed we get more of the same this year
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Swarms in the med are perfectly normal and should show more regularly due to the increase in the SIL network covering the area having been increased over the last 12 months.
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Much of the noise around Katla over the last couple of days has been down to the stormy weather up there.
The God chart always looks quite noisy due to its location. I tend to look at the Sly and Alf charts as its usually easier to spot the Harmonic tremors there.
As for the Daily Mail, well what can you say? nothing that hasnt been said already i guess, just 8 days ago their headline was about Scotland about to be battered by 2 Hurricanes in 3 days..
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There is still not a great deal of news from El Hierro.. authorities are considering allowing residents back to collect belongings and for the fishermen to get their boats also.
The number of earthquakes have dropped back and harmonic tremors appeared to abruptly stop at one point last night which to me suggests that the magma has hit a blockage in its journey to the surface. Its not unusual for all activity to drop off before a full eruption.
There are a lot of questions as to the submarine event and whether it was a 'degassing' event as some are suggesting however its not been possible to assess the sea floor at this time.
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So initial reports from El Hierro are suggesting that a submarine eruption began possibly 20 hours ago at a depth of around 1000m although they appear to be having problems in determining if this is the case.
Assumption has been made on the basis that the earthquake swarms began pushing up from depth and have been located at about 1km below the surface which given that the previous quakes had been in the 8-12km range shows the magma to have found a way to the surface.
Been watching the local tv output but sadly even my pigeon Spanish is shocking although a lot of what they are running is what if's and historic footage of other underwater eruptions.
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Some of todays data for Katla has been released and its pretty interesting stuff
http://hraun.vedur.is/ja/Katla/myr_allt.html
Most interesting is the amount of energy being released during these earthquake swarms (normalised number of earthquakes)
From the graph you can see that there has been a steady increase in seismic activity (red line) however the blue line appears to be key as this shows the relative amount of energy being produced and if you follow the line it shows a sharp rise in energy.
Theres clearly a lot of ongoing turmoil beneath all that ice.
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Signature of the tremors seems rather more seismic although there are clearly some harmonic tremors in there, guess the question is did one cause the other.
Its all gone very quiet again on the SIL stations so she may be off for another snooze.
Interestingly the conductivity in Mulakvisl has increased further in the last 24 hours and has seen a rapid increase in conductivity coming out of the glacier since around the 2nd Oct.
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Must admit ive been an avid watcher of Katla for years even before Eyjafjallajokull blew and made everyone look at Iceland again and to totally honest she has snoozed, slept, stirred and snoozed over and over. The last 12 months have been a bit different in that she really does now seem to be in an eruptive phase (now please don't think i mean imminent, she still could be years away) especially with the small eruption that produced the jokulhlaups.
Its still very much a case of keep watching.
On the El Hierro front.. Jon has written a neat wee piece on his blog that provides a little insight into what he thinks is happening with some detailed graphics to show the 3D look of whats happening under the volcano.
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Well its like waiting for a bus... its been quiet for the last 3-5 days and you look away for one second and Katla has another swarm.
Interesting that the current swarm is over the 1955 eruption site with a harmonic tremor only really showing up on the GOD sil, also there appears to be uplift too however the sources for this suggest it could be glacial changes due to it beginning a sustained refreeze. The size being quoted for the uplift varies quite a bit which does make it awkward to interoperate.
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The current spike has continued to build for a good part of the afternoon and as can be seen from the IMO charts has also seen some earthquake activity
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No, the depths are too significant.. Jon's seismometer over at Hekla is picking the quakes up too, just had a flurry of them all centred towards the eastern side of the caldera. Certainly not suggesting anything is about to happen as we have to remember this has been the way of things for quite a while now.
Typical though Jon should take the weekend off
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Very strong harmonic tremor in Katla being picked up on several of the monitoring stations... been running for the last 2 hours or so seeing some earthquake activity now too.
These spikes have been a characteristic of the last couple of months... the depth also suggests that it could be magma on the move again.
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Large Earthquake swarm in southwest Iceland overnight.
Somethings about to give soon I think,
Afraid its nothing quite so exciting...
Its the geothermal power station at Hengill that is causing these quakes. From time to time the pumps force cold water down into the bedrock which causes these earthquake spikes, at present they are currently pumping water so expect to see a few more clusters over the next week.
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Things do seem to have picked up in glasgow... sustained winds being recorded of 40mph at the mo, 72mph still the top gust.
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Wind has swung to the west here with a 72mph gust in Glasgow
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ooooh a gust of 66mph in Glasgow.. picking up a wee bit.
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Not too bad in Glasgow.... storm at end of May was much worse.
Just blowy and very wet here although doesnt seem to have stopped people being out in shorts and t-shirts
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I would urge people not to be lulled into a false sense with Katia here.
The winds at gusting pretty high in some areas that were not forecasted i.e the winds are further south than thought.
Aberdaron(wales) sutained winds of 58mph and gusts to 70mph, the forecast by GFS was 35mph, Shap 44mph, forecasted 23mph, the same story in Portland, Rissinglinton in the midlands etc
Both Barra in Scotland and the M4 bouy off Ireland have a pressure of 972mb which indicated a larger and lower centre than that forecasted, we won't really know though until we get some obs from the centre. But the lowest pressure forecast form the NAE for the M$ bouy was 974-975mb
So to recap for me the story so far is winds stronger, particularly in the west and Wales, with the worst still to come, gusts upto nearly 90mph pressure probably lower than thought.
With one reading at 969 its definitely coming in with a lower pressure and as you suggest perhaps a larger centre too.
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Pressure dropped to 969 just off northern ireland on buoy 62105
seems quite calm in Glasgow although Bishopton is reporting sustained winds of 24mph now
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http://en.vedur.is/e...sm/earthquakes/
seems to be a lot of activity at iceland today
quake also near our old friend nabro in ethiopia
mag 3 only 5km deep and 1.54km away
http://hisz.rsoe.hu/...read&rid=210250
might not mean anything ,but worth watching.
Yeah they are pumping cold water down into the bedrock again at Hengill which is triggering all the quakes there.... amazing how they run most things off geothermal over there.
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M6 Buoy 62095 reporting a drop of 9.2 mb in last recorded info that means its seen a 21mb drop in 3 hours 4mb then 7mb
Currently showing 979mb i think... (converting from inches)
Scotland - Regional Discussion - New Year
in Spring Weather Discussion
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lights been going on and off here in the city centre...... its only a wee bit of wind too