There are two types of lava, and both can be seen in this video. Pahoehoe lava flows smooth and often cools into billowy textures. It can be seen flowing quickly at the start of the video. The other kind of lava, ‘a’a, doesn’t really “flow” — it resembles jagged rocks or large pieces of broken glass. It makes a telltale clinking and crackling sound as it inches across the landscape. ‘A’a can be seen starting at around the three-minute mark.
“In an eruption with a high effusion rate — where a lot of lava is being discharged at once — `a`a flows tend to form,” writes the Hawaiian Volcano Observatory. “If the rate of effusion is low, a pahoehoe flow is more likely to develop.”
The Hawaii Volcano Observatory says that no neighborhoods or structures are in danger from this particular flow.