Standing waves in lava on KÄ«lauea
by Rob Beschizza from on (#3SBRH)
From KAlauea, where the eruption continues, now with "lava flowing unabated with standing waves."
You can see them to the left of the photo here, taken by a USGS drone over the flow, and in this video:
https://twitter.com/USGSVolcanoes/status/1007340636867973120