Kilauea just fired lava 500 feet high and set an all-time record with its 52nd episode

Kilauea’s summit eruption reached another milestone on the night of July 28, 2026, when a single vent inside Halemaʻumaʻu crater threw a lava fountain roughly 500 feet into the sky and pushed the volcano’s ongoing series to its 52nd fountaining episode. The display, framed by a full moon, drew visitors to overlooks inside Hawaiʻi Volcanoes National Park. It also extended what scientists now call the longest run of fountaining episodes documented at any single Hawaiian eruption.

The episode was brief but intense. It began in the evening, ran through the night, and shut off before dawn, leaving a fresh sheet of lava across much of the crater floor and a towering gas-and-ash plume that was visible for miles. For a volcano that has erupted in repeated bursts since late 2024, episode 52 was another entry in a cycle that has become unusually consistent and unusually well studied.

Episode 52 over Halemaʻumaʻu crater

According to the U.S. Geological Survey’s Hawaiian Volcano Observatory chronology, fountaining began around 7:10 p.m. Hawaii time on July 28 and ended abruptly at 2:36 a.m. on July 29, lasting nearly seven and a half hours. The north vent’s lava fountain reached a peak height of approximately 500 feet, or 150 meters, near 9:00 p.m., while the eruption plume rose to an estimated 19,000 feet above sea level.

The volume moved during that short window was substantial. The instantaneous effusion rate peaked at about 350 cubic yards per second, with an average rate near 250 cubic yards per second across the episode. An estimated 6.1 million cubic yards of lava erupted and spread over roughly 40 to 50 percent of the Halemaʻumaʻu crater floor. Only the north vent produced a fountain; the south vent stayed quiet, emitting flames only at the very end. Precursory overflows and dome fountaining had signaled the buildup through the afternoon before the main burst.

How the record was set

The current eruption did not become a record-holder with episode 52. That threshold was crossed nearly two months earlier. The observatory’s chronology of episode 48 notes that the June 1, 2026, event gave the Halemaʻumaʻu eruption the most fountaining episodes ever recorded for an episodic fountaining eruption at Kilauea, edging out the 47 high fountains produced by the Puʻuʻōʻō eruption between 1983 and 1986.

Episode 48 itself was a strong one, with the north vent reaching about 650 feet. Each subsequent burst has widened the margin. By the time the 52nd episode ended, the eruption had stretched its lead five episodes beyond the prior benchmark, a tally that observatory scientists have described as the largest number of eruption episodes seen at a Hawaiian volcano in recorded history.

The eruption that began in December 2024

The fountaining that produced these records is part of a summit eruption that started on December 23, 2024, and has proceeded in discrete episodes rather than as a single continuous flow. The pattern has held for well over a year and a half: periods of quiet inflation, during which magma accumulates and the ground slowly swells, followed by short, vigorous fountaining phases that release the built-up pressure through the summit vents. Between episodes the crater floor typically deflates as the reservoir drains, resetting the cycle.

That rhythm has made the eruption something of a natural laboratory. Because the episodes tend to be preceded by recognizable precursors, including small lava overflows, rising dome fountains and changing volcanic tremor, observers have often been able to anticipate the onset of fountaining by hours rather than being caught by surprise. The intervals between episodes have varied from days to a few weeks, but the underlying sequence of inflation, precursory overflow and sudden high fountaining has repeated with enough regularity to become a defining signature of this eruption. That predictability, combined with the confinement of activity to the summit caldera, has allowed large numbers of people to watch each burst safely from designated overlooks.

Monitoring at the Hawaiian Volcano Observatory

Scientists have documented each episode through webcams, field measurements and helicopter overflights. A morning flight after episode 52 gave geologists clear views of the crater and the new cone-building around the active vents. The observatory publishes continuing assessments through its Kilauea volcano updates, which describe hazards tied to the eruption even when it is confined to the park.

Those hazards are chiefly airborne rather than lava-driven at the summit. High levels of volcanic gas, including sulfur dioxide, can create vog, a haze that forms when volcanic emissions react in the atmosphere, and fountaining lofts fine volcanic glass fibers known as Pele’s hair along with lighter tephra that can drift beyond the immediate vent area. As long as the fountaining remains inside Halemaʻumaʻu, the lava itself poses little direct threat to communities, but shifting winds can carry gas and glass fragments across nearby overlooks and roads, and elevated emissions have periodically prompted air-quality cautions on the island.

The record set at the summit also underscores how much the current eruption differs from the Puʻuʻōʻō activity it surpassed. That earlier eruption unfolded along Kilauea’s East Rift Zone and eventually fed long-lived flows that reshaped communities downslope over decades, whereas the present episodes have stayed contained within the summit caldera in a national park. The contrast is one reason scientists have been able to document the fountaining so closely and why the sequence has become a widely watched spectacle rather than a destructive event. For now, the eruption continues its episodic march, and each new fountain adds to a tally that already stands alone in the documented history of Hawaiian volcanism.

This article was produced with AI assistance and reviewed by Morning Overview editors.

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