are lava flows fast moving
Fast moving lava flows from Puâu âOâo Vent: A fast moving lava flow has advanced nearly 3 miles (4.4 km) north-northeast from its source at Puâu âOâo Vent over the past week. The flow originated on June 27th, when lava broke out from fissures on the northeast flank of Puâu âOâo Cone.