At KÄ«lauea’s ocean entry on Jan. 28 and 29, the interaction of molten lava flowing into cool seawater caused pulsating littoral explosions that threw spatter (fragments of molten lava) high into the air. Some of these incandescent clasts fell on top of the sea cliff behind the ocean entry, forming a small spatter cone. During one exceptionally large burst, spatter was thrown about twice the height of the sea cliff. These ocean entry littoral explosions, both large and small, create hazardous conditions on land and at sea. Photo taken Monday, January 30, 2017 courtesy of USGS/HVO