Kilauea is building toward another eruption, and scientists say it could happen before the day is out. Overnight, the south vent inside Halemaʻumaʻu crater lit up with strong, steady glow and repeated bursts of large flames, a visible escalation from the quieter pauses that have separated the volcano’s dozens of lava-fountain episodes over the past 17 months. The Hawaiian Volcano Observatory, the USGS division that monitors Kilauea around the clock, reported that rapid summit inflation is tracking the same pattern that preceded each of the 46 prior episodes. “Episode 47 could begin within hours,” the observatory stated in its daily status report.
Kilauea’s current eruption sequence started on December 23, 2024, and has produced episode after episode of lava fountaining from vents on the floor of Halemaʻumaʻu, the large crater at the volcano’s summit inside Hawaii Volcanoes National Park. The volcano remains at a Watch alert level with an Orange aviation color code, both one step below the highest tier.
What the instruments are showing
The clearest signal comes from electronic tiltmeters bolted to the ground near the summit. Over the past 17 months, those instruments have traced a repeating sawtooth pattern: the ground swells as magma fills a shallow reservoir beneath the crater, then drops sharply when an eruptive episode drains that reservoir through the vents. Each tooth in the graph corresponds to one episode. Right now the tilt curve is climbing steeply, and HVO’s forecast that Episode 47 is hours away is based on how the current rate of rise compares to the curves that preceded earlier episodes.
Visual observations back up the instrument data. USGS summit webcams, including the V3cam and K2cam feeds, showed the south vent producing the kind of intense glow and flame bursts that typically appear in the final hours before continuous fountaining begins. The north vent, by contrast, displayed only weaker glow and small spatter, a sign that the two vents are not pressurizing symmetrically as magma pushes upward. Both vents are actively releasing volcanic gas even during the current pause.
The USGS Kilauea eruption information page maintains a structured timeline of every episode, including monitoring references and descriptions of the tilt stations HVO relies on. The Smithsonian Institution’s Global Volcanism Program independently compiled alert levels, episode timing, fountain heights, and plume data in a May 2026 report, confirming the broad shape of the eruption sequence for international researchers.
What Episode 46 looked like
Episode 46, the most recently completed event in the sequence, offers a concrete reference point. Like most episodes in the series, it began when the summit tilt curve peaked and magma broke through to the surface at the Halemaʻumaʻu vents. Lava fountains during recent episodes have ranged from roughly 20 meters to more than 60 meters in height, and individual episodes have lasted anywhere from a few hours to more than a day, according to data compiled in the Smithsonian’s May 2026 report and the USGS eruption timeline. Episode 46 fell within that range, reinforcing the pattern while also illustrating that no two episodes are identical in duration or vigor.
What is still unknown about Episode 47
HVO has not yet issued a formal observatory message marking the start of Episode 47. Those time-stamped notices are the official record that continuous lava fountaining has begun, and as of the most recent daily update, that threshold has not been crossed.
Fountain heights and duration are also impossible to predict in advance. Earlier episodes have varied considerably. Some produced towering jets of molten rock; others were shorter and less vigorous. No specific forecast for Episode 47’s intensity has been published.
That uncertainty matters for people on the Big Island. Sulfur dioxide emissions spike during active fountaining, and the resulting vog (volcanic smog) can degrade air quality across wide stretches of the island, particularly in Kona and downwind communities on the leeward coast. The Hawaii Department of Health monitors SO₂ and fine particulate levels during eruptions, and residents with respiratory conditions are routinely advised to limit outdoor exposure when vog is heavy.
Park access is another open question. Hawaii Volcanoes National Park has adjusted closures and viewing areas throughout the eruption sequence, but specific road closures or restricted zones tied to Episode 47 have not been announced. Visitors who have watched previous episodes from overlooks along Crater Rim Drive know how quickly access can change once fountaining starts, so checking the National Park Service conditions page before heading to the park is essential.
Why the pattern holds, and where it has limits
Forty-six consecutive episodes following the same general inflation-to-eruption cycle is a remarkably consistent track record, though the intervals between episodes have varied from less than a day to several days, and occasional pauses have lasted longer than the average. That variability means the pattern is a strong guide but not a precise clock. Still, it gives HVO’s “hours away” forecast a solid statistical foundation: every time the tilt curve has climbed this way, an eruption has followed. The webcam imagery of intensifying vent glow adds a second, independent line of evidence that hot, gas-charged magma is already close to the surface.
But the pattern tells scientists that an episode is coming, not exactly what it will look like. A faster-than-average inflation rate could mean the episode arrives sooner than expected, or it could mean the shallow reservoir is storing more magma and the fountaining phase will be longer and more energetic. Without a published comparison of the current inflation rate to a historical average, that distinction remains an open question.
One thing the monitoring data does clarify: there is no sign of magma migrating rapidly into the East Rift Zone or toward lower-elevation communities, according to the most recent HVO assessment. The activity described in the daily update is confined to the summit and to Halemaʻumaʻu crater. Summit lava fountains are visually spectacular, but they generally pose far less direct risk to populated areas than flank eruptions that open new vents downslope.
What Big Island residents and visitors should do now
For anyone on the island, the practical takeaway is straightforward: pay attention, but do not panic. Monitor HVO’s daily updates and observatory messages for the official word on when Episode 47 begins. Check air-quality reports if you are sensitive to vog. And if you are planning a trip to Hawaii Volcanoes National Park, confirm that your intended route and viewing area are open before you drive.
How Episode 47 fits into Kilauea’s 17-month fountaining sequence
For volcanologists, Episode 47 will add another data point to one of the longest-running episodic summit eruption sequences in Kilauea’s modern record. Each new episode sharpens the models that describe how the volcano’s shallow plumbing system pressurizes, ruptures, and resets. That cycle is playing out again right now, and by all available evidence, the next rupture is close.
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*This article was researched with the help of AI, with human editors creating the final content.
