Hawaii Eruption Information

Eruption returns in Halemaumau Crater

December 2024 - January 2025 Eruption

Episode I

The eruption within Halemaumau Crater (view USGS Eruption GIF here) began at approximately 2:20 a.m. on Monday, December 23, 2024, and vents erupted on the floor of the southwest part of the summit caldera.

At 4:30 a.m., lava fountains were observeEd with heights up to 80 meters (262 feet). Molten material, including lava bombs, was being ejected from the vents on the caldera floor up onto the west caldera rim, within the closed area of Hawaiʻi Volcanoes National Park. The volcanic gas and ejecta hazards west of the erupting vents stress the hazardous nature of this closed area of Kīlauea's summit. By 5:30 a.m., lava covered an estimated area of 400 acres of the caldera floor.  

Eruptive activity is currently confined to the summit region. No significant changes have been observed in the rift zones.

Around 3 p.m. on the eruption day, the summit's tilt stopped showing deflation, and seismic tremors began decreasing. By 3:30 p.m., lava fountains were barely visible. By 4 p.m., the fountaining had stopped, and seismic tremor was close to background levels. Visible volcanic gas emissions have also decreased significantly. These observations indicate that the eruption has slowed considerably and appears to be entering a pause.

Episode II

The eruption at Kīlauea volcano that began on Monday, December 23, continued the morning of December 25, 2024.  The eruption had been relatively stable over the past day, following the resumption of activity that occurred yesterday morning. Vigorous lava fountains remain active in the western portion of Halema‘uma‘u crater, sending lava flows across the crater floor. Eruptive activity remains confined to Halemaʻumaʻu and the downdropped block within the caldera and may fluctuate in vigor over the coming days.

Episode 2 of the December 2024 summit eruption of Kīlauea paused just before 11:00 a.m. on Christmas Day. 

The vigorous fountaining from vents in the southwest corner of Halemaʻmaʻu crater rapidly died down over a few minutes just before 11:00 a.m.  Lava began draining back into the vent at 11:00 a.m. at nearly the same time summit tiltmeters began recording a change from deflation to inflation.  Seismic tremors also decreased markedly at the same time.  The pattern was similar but more abrupt than the pause onset on Monday, December 23, between 3 and 4 p.m. 

Episode 2 lasted a little over 24 hours, about twice the duration of the first eruptive episode.  Prior summit eruptions have lasted days to weeks, and there is a high probability that this eruption will resume if the summit repressurizes in the coming days.

Episode III

Around 6 p.m. on December 27, 2024, the eruption transitioned from low level lava flows to the onset of more vigorous fountaining.

Lava began erupting from vents around 8 a.m. yesterday morning (December 26) marking the beginning of the third phase of the ongoing summit eruption.  Sluggish lava flows continued to erupt from the northern vents for the next day and a half. This was much longer than the 3-4 hours of sluggish eruption that preceded the fountaining of the second episode. Current fountain is occurring bursts up to 30-45 ft (10-15 m) high from the two most northern vents. If fountaining continues, it is possible that the fountain heights will increase as more gas-rich lava erupted. It is not possible to estimate how high the fountains may get or how long the fountaining will last, but prior episodes have produced fountains over 200 feet high (70 m) that last up to 24 hours.

The eruption within Halemaʻumaʻu crater paused at approximately 8:40 p.m. on January 3, 2025, with both fountaining and lava flow effusion ceasing at the same time. Currently there is no lava draining back into the southern vent, which was the only vent actively erupting at the time.

Episode IV

Around 9:15 a.m. HST on January 15, 2025, the eruption of Kīlauea within Kaluapele (summit caldera) resumed with a small lava flow exiting the north vent, following low-level continuous lava spattering that started around 5:40 a.m. HST. from the same vent. Around 9:55 a.m., low-level lava fountaining started with more rigorous lava flow activity.

The small sluggish lava flow from the north vent at around 9:15 a.m. on Wednesday January 15, 2025, marks the beginning of the fourth episode of the ongoing summit eruption.

On January 18, 2025, the eruption within Kaluapele (summit caldera) paused around 10:10 a.m. H.S.T. Activity greatly decreased at approximately 9:45 a.m. the morning of January 18, 2025, when the north vent fountain and associated lava flow stopped erupting, and south vent activity greatly diminished at the same time. Lava continued to flow from south vent for another 20 minutes at a much reduced rate.

Eruption in remote part of HVNP

September 2024 Eruption

Kilauea volcano erupted briefly just west of Napau Crater on the middle East Rift Zone. This eruption likely occurred between approximately 9:00 and 10:00 p.m. HST on Sunday 15, 2024, in a remote and closed area of Hawaiʻi Volcanoes National Park. Chain of Craters Road, which is closed, is located downslope and downwind of the new fissures.

On September 16, 2024 the eruption resumed in the middle East Rift Zone at about 6 p.m. HST. Activity continued overnight, but generally decreased.

On September 17, 2024, approximately 4 a.m. HST, activity increased and during a morning overflight at approximately 8 a.m. HST, HVO geologists observed that new vents had opened in Nāpau Crater. In total, the fissure system has stretched over 1.6 kilometers (1.0 miles) of the East Rift Zone, with lava flows now covering 18 hectares (44 acres).

On September 18, 2024, during the USGS Hawaiian Volcano Observatory morning monitoring overflight, geologists observed that the activity had greatly decreased. Only weak low fountaining within a tiny lava pond was observed at one vent.

At 3:15 p.m. HST, on September 18, 2024, new eruptive fissures opened west of Napau Crater. A monitoring camera deployed by HVO field crews with permission from Hawaiʻi Volcanoes National Park recorded “lava falls” cascading down the northwest walls of Napau Crater. Vigorous activity continued and by the morning of September 19, about 2/3 of Napau Crater floor had been covered with new lava.

As of 10 a.m. HST on September 20, 2024, eruptive activity had paused.

As noted previously, additional Kilauea & Mauna Loa eruption history events can now be found on our Big Island Historical Eruptions page.