Activity Summary: Kīlauea volcano is not erupting. Continued summit inflation and recent increased seismic activity suggests an increasing amount of magma is being stored underneath the summit area.
Summit Observations: Seismicity at the summit over the last 24 hours has been low with approximately 8 earthquakes, all below magnitude-2.0. Since the September eruption in the East Rift Zone, there have been sustained rates of inflation at the summit. The most recent measurement of the sulfur dioxide (SO2) emission rate from the summit was approximately 70 tonnes per day on October 17, a value representative of noneruptive conditions at Kīlauea. Unfavorable weather and wind conditions have delayed acquisition of a new SO emission rate measurement.
Rift Zone Observations: Shallow earthquake counts in the upper and middle East Rift Zone (ERZ) remain at low levels. Over the last 24 hours, there was one recorded earthquake in the middle ERZ and approximately 2 in the upper ERZ, all below magnitude-2.0. Deformation remains low in the ERZ, as recorded by GPS instruments and tiltmeters. There are no indications of any changes downrift in the lower East Rift Zone.
Analysis: Kīlauea erupted briefly in and near Nāpau Crater from September 15-20, 2024. Lava flows from this eruption covered more than 880,000 square meters (217 acres) of Nāpau Crater and areas to the west. A webpage with eruption-related resources is available here: https://www.usgs.gov/observatories/hvo/science/september-2024-napau-eruption#overview
Since that most recent eruption, unrest has continued at low levels at the summit and on the ERZ of Kīlauea. Rates of seismicity and ground deformation have greatly decreased since the eruption, but geophysical data show that magma is continuing to move at a low rate into the volcano. Future intrusions and eruptions could occur with continued magma supply.
Hazards: Near the recent middle East Rift Zone eruption site, minor to severe ground fractures and subsidence features may continue to widen and offset, may have unstable overhanging edges, and should be avoided. Hazards associated with the recent lava flows include glassy (sharp) surfaces that can cause serious abrasions and lacerations upon contact with unprotected or exposed skin; uneven and rough terrain that can lead to falls and other injuries; or locally elevated levels of volcanic gases that can lead to breathing difficulty.
Hazards remain around Kīlauea caldera from Halemaʻumaʻu crater wall instability, ground cracking, and rockfalls that can be enhanced by earthquakes within the area closed to the public. This underscores the extremely hazardous nature of the rim surrounding Halemaʻumaʻu crater, an area that has been closed to the public since early 2008.
For discussion of Kīlauea hazards, please see: https://www.usgs.gov/observatories/hawaiian-volcano-observatory/hazards.
Updates: Given activity over the past week, HVO will switch from weekly updates to daily updates starting tomorrow Wednesday December 18. Additional messages will be issued as needed. HVO continues to closely monitor Kīlauea and is in contact with Hawai'i Volcanoes National Park and the Hawai'i County Civil Defense Agency. Should volcanic activity change significantly, a Volcanic Activity Notice will be issued. Please see the Hawaiʻi Volcanoes National Park website for visitor information: https://www.nps.gov/havo/index.htm.