This video shows a draining event in the lava pond within the Halema'uma'u vent cavity located in Hawaii Volcanoes National Park. The lava column exhibited cycles of filling and draining of the vent cavity, with each cycle lasting a few minutes.

Based on your observations, what are the likely types of lava flow or features that might be produced at the vent's opening to the ground surface?
Choose one or more:
a’a’
pyroclastic
pillows
lahar
tephra
pahoehoe