Measurements, made at Nýsköpunarmiðstöð Íslands, show, as was to be expected, that the particle size is greater closer to the eruption site.
However, one (18.4) of the two samples taken 20 km away, is very similar to the one taken nearly 60 km away (15.4).
The sample collected on 15.4 by Sigurður Reynir Gíslason and on the 17 and 18. 4 by Guðrún Larsen and Ármanni Höskuldssyni.
Below is a map of the distribution of SO2 from 23 April 2010.
I also post the picture I used to tell the distribution of small particles on the 23rd – pretty good match.
Image taken 12:40 on 23 April 2010.
Here is then the distribution of SO2 from yesterday, 24 April 2010.
And the true color image from 24 April 2010, at 13:05.
Not much action visible, nor reported, in the eruption at Eyjafjallajokull.
A bit of ash falling in areas getting ever closer to Reykjavik, but in very small, trace, amounts.
Some if it is most likely re-suspended ash, and dust storm, as can be seen from the image below from 11:42 today, 24 April 2010.
In all likelihood my interpretation of the ash plume yesterday was correct, judging from reports of ash fall.
The following satellite images, from 12:20 and 12:40 today, 23 April 2010, show, at least I think they do, that the eruption plume (ash) has travelled north and then west from the eruption site at Eyjafjallajokull.
If this is correct, the plume is quite close to Reykjavik, but still not all the way. Nothing to worry I would think, not much being emitted by the volcano now, and the plume has travelled quite far.
I do also stress that this is just my speculation right now !
If someone can provide further evidence, for or against this interpretation, please let me know !
Difficult to see on this true color image from 12:20, but with some effort it is possible to see the plume traveling north from the eruption site, and then (even more difficult to see) turning west.
This image, I think, shows the eruption plume (ash) as the red color (at least this is what we designed this image to detect). If correct, the plume travels north and then west, almost reaching Reykjavik area, but not quite.
I am not absolutely sure about this interpretation, so any evidence for or against would be greatly appreciated.
This false color image shows the plume quite nicely heading north and then turning west – as it sort of merges with clouds (present at that time).
Satellite image from 12:20 today, 23 April 2010. Small plume, appears to be mostly steam.
