Hawaiian Volcano Observatory


HVO monitors the active volcanoes in Hawaii, assesses their hazards, issues warnings, and advances scientific understanding to reduce impacts of volcanic eruptions. 

Recent Kīlauea Eruption Information


Date published: December 2, 2021

Volcano Watch — A cloud of ten thousand points: terrestrial laser scanning of Halemaʻumaʻu

Scientists at the USGS Hawaiian Volcano Observatory (HVO) largely rely on aerial data collection for making maps of ongoing eruptions at Kīlauea. Most commonly, scientists collect a series of overlapping aerial photos (optical or thermal). 

Date published: November 29, 2021

Photo and Video Chronology – Kīlauea – November 29, 2021

The ongoing eruption at Kīlauea's summit began at 3:21 p.m. HST on September 29, 2021. Lava activity is currently confined within Halema'uma'u crater. Gas emissions and seismic activity at the summit remain elevated. HVO field crews—equipped with specialized safety gear—monitor the eruption from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

Date published: November 24, 2021

Volcano Watch — The refilling of Halemaʻumaʻu crater

Halemaʻumaʻu crater has undergone repeated changes during the past two centuries. Prior to 1924, the size and shape of the Halemaʻumaʻu lava lake changed frequently and lava commonly spilled out across the floor of Kīlauea caldera. 

Find a U.S. Volcano