Undular bore above Arabian Sea
NASA (Image  by Jeff Schmaltz, MODIS Rapid Response System at NASA GSFC; Image interpretation by Belay Demoz, NASA GSFC)
"<a rel="nofollow" class="external text" href="https://earthobservatory.nasa.gov/IOTD/view.php?id=7758">Wave Clouds over the Arabian Sea</a>"