Thank you As a matter of fact userInvertzoo and me were the ones who completely rewrote the article From many images that are used in the article I believe this one is one of the most interesting I saw this kind of display only two times two days in a row I was surprised to find out that This effect was first described in the medieval Kings Mirror like this hafgerdingar look as if all the stormwaves of the sea were gathered together in three continuous combers the three wavecrests surround the whole sea in such a way that there is no escape opening  they are higher than big mountains and as steep as precipices so that in but few cases have people escaped from the sea when this has occurred It is amazing that medieval explorers saw and described it I assume it looked really scary to them I have Flickr account but I forgot when I used it the last time  Best wishes