That's amazing riming ;does the volcano cause this , or is it normal in thes parts. We get riming in the UK too , but not as good as this eg. http://www.summitpost.org/view_object.php?object_id=192458&context_id=192381
that it's caused by the wind. We get some pretty beautiful examples of it round these parts. Someone already has an album started here: http://www.summitpost.org/album/188275/rime.html which I will add some pics to.