probably sulphur dioxide, or VOG in Hawaii.  The usual advice is close 
the windows and no vigorous outdoor activity, particularly for children.

Cheers

Ian

Jón Frímann wrote:

>Hi all
>
>For the first time, i can smell a solfourdyoxisde (i don't remember how
>it is spelled) that comes from this glaciar outburst flood coming from
>Vatnajokull. The smell is bad. This smell is also felt on most of the
>Northen part of Iceland, but the wind is SE at the moment.
>
>Regards.
>  
>
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