Tech & Science / Kīlauea Update / November 10, 2026
Kīlauea Is Reinflating After 660-Foot Lava Fountains. What Comes Next?
Kīlauea is reinflating after episode 56. USGS says the next lava fountains are likely more than a week away as cameras and sensors track changes.
Kīlauea’s latest lava fountains have stopped, but the volcano is still changing. After sending lava about 660 feet into the air on November 5, the summit is reinflating. In its November 9 update, the U.S. Geological Survey’s Hawaiian Volcano Observatory said the next episode of fountaining was likely more than a week away, based on earlier episodes and the ongoing tilt trend.
That assessment came with a quieter but important set of observations: moderate glow at the north and southwest vents overnight, elevated seismic tremor and no earthquakes located at the summit in the preceding day. The Uēkahuna instrument had recorded 7.4 microradians of inflationary tilt since episode 56 ended, although the tilt had been relatively flat since midnight. The current volcano alert level was ADVISORY, with an aviation color code of YELLOW.
The November 9 HVO update, issued at 8:43 a.m. Hawaiʻi time, describes a pause in an ongoing episodic eruption, not a declaration that the volcano is finished. Nor does it announce a date for the next fountain. For people following the eruption, the central question is what the instruments can show during the interval between the spectacular bursts of lava.
Episode 56 lasted from 12:10 p.m. to 6:01 p.m. Hawaiʻi time on November 5. Only the north vent produced fountaining. The plume reached as high as 18,000 feet above sea level, while the lava fountain reached about 660 feet above its vent. Those are different measurements of different features. Keeping them separate is a first step toward understanding an eruption whose photographs can look more straightforward than its data.
Recent USGS publications explain how those numbers are produced. An October 30 announcement highlighted public measurements and raw images for episodes 1 through 50; a November 5 account described camera calibration and the human work of locating a fountain’s upper edge. The archive does not yet claim to include episode 56. But the methods help explain what scientists are watching now, and why neither a glowing webcam frame nor one rising line on an instrument plot is enough to predict the next event.
HVO’s methods explanation and data announcement provide the technical background to the latest operational update.
FIELD NOTE 01One eruption, two kinds of measurement
During an active episode, observatory scientists need a useful estimate quickly. HVO describes watching webcams, including K2cam at Uēkahuna, with an overlay that supplies an approximate scale. The scale depends on the camera’s field of view and its distance from the vent. This is the measurement that can inform a status report while the fountain is still changing.
After the episode, the workflow slows down. Geologists retrieve memory cards from timelapse cameras around the caldera rim and analyze the recorded sequence. A fixed lens helps keep the viewing geometry stable. The observatory’s public explanation describes cameras taking one image per minute; the data-release description gives acquisition intervals of half a minute to one minute, with height measurements generally made each minute. The distinction is between how frequently an image exists and how frequently the published measurement is made.
An immediate estimate and a later measurement should therefore not be treated as interchangeable products. The first supports situational awareness while conditions evolve. The second can apply a consistent definition across an entire episode and preserve the underlying images for scrutiny. A revised number can reflect more careful measurement rather than a contradiction in what happened at the volcano.
This matters especially when an image is shared without its time or camera name. A single frame can show an impressive peak, but it does not establish how long that peak lasted. A sequence can show the fountain growing, fluctuating and declining. For research, the shape of that history can be as informative as its largest value.
FIELD NOTE 02The lens has to become part of the ruler
A digital photograph records positions in pixels. Those positions do not automatically translate into feet or meters. The same physical object can occupy very different amounts of an image depending on the lens, the camera’s distance and where the camera is pointed. Before a fountain becomes a height measurement, the image needs a known geometry.
HVO describes photographing a checkerboard calibration pattern in the laboratory from several angles. Software uses those views to characterize the field of view and lens distortion. The field team then needs the distance between camera and vent, using GPS coordinates and aerial mapping of the vent complex. Together, those inputs connect an image-space measurement to a physical scale.
The fixed lens is a practical advantage. A camera that continually changes its zoom would continually change the relationship between image size and the landscape. Keeping that relationship stable reduces one source of ambiguity. It does not eliminate the need to know where the vent is or what part of the fountain is being measured.
The photographs accompanying this article offer several perspectives on the same November 5 episode. Their different compositions are a reminder of why a dramatic-looking frame is not its own measuring instrument. A camera close to the vent and one looking across the crater cannot be compared simply by counting how much of the photograph the glowing material fills. The calibration information belongs with the image, even when it is invisible to a casual viewer.
FIELD NOTE 03Where, exactly, does a fountain end?
The measurement’s most consequential choice is its upper boundary. HVO measures the top of the continuous fountain body, excluding the sparse incandescent particles that rise above it. That definition is more conservative than a viewer’s instinct to follow the highest visible fleck of glowing lava.
The distinction is physical as well as visual. The dense central body blocks the view behind it; scattered particles above that body do not form the same continuous feature. If one observer includes every isolated particle and another stops at the dense column, their numbers can differ even when they examine the same photograph. A clearly stated boundary makes comparisons more meaningful.
For the detailed record, HVO staff work through images and click the fountain’s top, creating a series of pixel coordinates. The vent’s pixel position supplies the other end of the measurement. In the observatory’s description, processing a sequence of roughly 500 to 800 images can take about an hour. The task is repetitive, but it requires judgments that are easy to overlook when a final height appears as a single number.
Obscuration complicates those judgments. A fountain can merge visually with its plume, or its upper edge can be difficult to identify. The agency says manual measurements remain its most trusted approach at present, while applying artificial intelligence to this imagery is an ongoing project. That is a narrower claim than saying that machines cannot perform the task. It means that a proposed automated method still has to handle the particular uncertainties in these scenes.
FIELD NOTE 04What an automated system would have to prove
The measurement problem offers a concrete test for claims about scientific AI. Detecting orange pixels would not, on its own, reproduce HVO’s definition. A system would have to distinguish the dense fountain from separated particles, accommodate changing visibility and preserve a consistent relationship to the vent. It would also need to recognize when the image does not justify a confident result.
Those requirements follow from the observatory’s published method; they are not a description of a deployed HVO product. The November 5 explanation does not announce an operational AI replacement or provide a measured accuracy improvement. It identifies automation as a possibility under investigation. Readers should not infer a finished system from that discussion.
The public images make the question more testable. Researchers can compare a candidate method with the released manual measurements rather than with a handful of visually striking examples. Disagreements could then be inspected frame by frame: did the algorithm choose detached particles, lose the vent reference or respond differently when the background changed?
The broader lesson is about the definition of success. Faster processing is valuable only if the resulting time series measures a comparable feature. A very precise answer to a different visual question would not necessarily improve the scientific record. Before speed becomes the headline, the boundary being measured has to remain clear.
FIELD NOTE 05The dataset is a record with a cutoff
The USGS catalog describes a release by Matthew R. Patrick and Raymond G. Adams that contains the height measurements and the raw timelapse images used to make them. Its described version, updated in August 2026, includes episodes 1 through 50. The catalog states that later episodes are intended for a future version. The October announcement repeats that coverage.
That cutoff is essential context for the new photographs. Episode 56 is useful for explaining the monitoring process, but it should not be represented as part of the published 1–50 measurement series. Likewise, the first 50 episodes are not a complete history of an eruption that was continuing when the release was described. The dataset and the operational chronology advance on different schedules.
The catalog also places the measurements in a changing landscape. Lava flows have raised the western crater floor by more than 100 meters during this eruption, according to its description. An overflight photograph from November 4 shows the north-vent pond and a large accumulation of tephra around the vent complex. The scene is not a static laboratory backdrop.
These changes reinforce the value of retaining the images alongside the values. A numerical table is compact and easy to analyze, but it cannot show every visibility problem or shift in the scene. The raw record lets another researcher inspect a measurement, test a different approach or identify why a particular part of an episode is difficult to interpret. The USGS data catalog describes those materials and marks the work CC0.
FIELD NOTE 06A camera cannot describe the whole volcano
Fountain height is one visible part of an eruption. Ground instruments measure changes that a photograph cannot reveal directly. Tiltmeters track small changes in slope, while satellite-navigation receivers track the position of points on the surface. These observations help scientists interpret how a volcano is deforming as magma accumulates or moves underground.
USGS explains that an electronic tiltmeter works with a small fluid-filled container and a bubble, conceptually similar to a very sensitive level. Installing instruments in shallow boreholes helps shield them from surface noise, including temperature and pressure changes. The quantities are tiny: tilt is commonly expressed in microradians, far smaller than a degree.
A GPS or broader GNSS network provides another view. Repeated positions from multiple stations reveal the direction and rate of ground movement. Combining stations helps distinguish a local change from a wider pattern. The method differs from reading a position on a phone: the monitoring application depends on precise receivers, analysis and comparisons over time. The archival Newberry photograph illustrates that type of station, not a new installation at Kīlauea.
Even instrument plots require interpretation. HVO’s Kīlauea monitoring page cautions that positive tilt can reflect magma-storage inflation but can also result from heavy rainfall or occasional instrument problems. A line moving upward is therefore not, by itself, a complete explanation of the volcano’s condition. Camera observations, deformation and other monitoring streams need to be read together.
The technical background comes from USGS explanations of tiltmeters, GPS networks and Kīlauea monitoring data.
FIELD NOTE 07Why a pause still carries hazards
The November 9 assessment reached readers in South Korea early on November 10: its 18:43 UTC release time converts to 3:43 a.m. KST. That timestamp matters because an operational update can change as new observations arrive. The expectation of a pause longer than a week belongs to that report and should not be turned into a countdown for visitors or a promise of when activity will resume.
The distant plume view also shows why the eruption cannot be understood only by looking at the bright lava. HVO reported tephra fallout mainly to the southwest during episode 56, largely in closed park areas, with trace amounts along Highway 11. Wind and the behavior of the fountain influence where fragmented material travels. The near-vent photograph and the distant plume photograph document different parts of the same event.
Volcanic gases can remain hazardous downwind even when the vents are not actively erupting. HVO also described tephra, the fragmented volcanic material that includes ash and Pele’s hair. Small particles can travel farther than the large fragments falling near a vent. A photograph of Pele’s hair collected along Highway 11 after episode 56 shows why the edge of a lava flow is not the edge of every volcanic hazard.
Visitors need current park and civil-defense guidance rather than a photograph’s apparent calm. The eruption’s recent activity has occurred in a closed area of Hawaiʻi Volcanoes National Park, and the observatory warns that hazards and activity locations can change. The relevant reference for changing conditions is the dated HVO update, not a forecast reconstructed from a single image.
FIELD NOTE 08A more useful way to look at eruption pictures
The best questions to ask of a fountain photograph are modest and specific. Which camera made it? When was it recorded? Does the height refer to the continuous lava body or the highest isolated particle? Is the number an operational estimate or a measurement from a released research sequence? Those details turn a striking illustration into evidence that can be compared responsibly.
For a dataset, another set of questions follows. Which episodes are included? Are the images available as well as the measured values? Has the version changed since a summary was written? These are ordinary questions of scientific documentation, but they matter especially during an eruption whose newest images can move much faster than its carefully processed record.
Kīlauea’s fountains will continue to attract attention for their scale and color whenever activity resumes. The quieter technical achievement is the ability to turn a changing, partly obscured scene into a record with defined boundaries and inspectable evidence. The cameras capture the spectacle. Calibration, fieldwork and careful judgment make it measurable.
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