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