The USGS said lava fountains from the north vent reached a maximum height of between 500 and 600 feet before they started to decrease.

Kilauea, one of the world's most active volcanoes, has been erupting on and off for nearly two months since it burst to life on Dec. 23. The eruption has been taking place at the volcano's summit crater inside Hawaii Volcanoes National Park. No residential areas have been threatened by lava.

Kilauea, located about 200 miles (320 kilometers) southeast of Honolulu, is one of five volcanoes that make up the Big Island of Hawaii. The volcano's summit is about 4,091 feet (1,247 meters) above sea level.