Case No. #1487
Geometric Luminous Objects Above Sakurajima's Crater
Summary
In March 2024, during a period of heightened eruptive activity at Sakurajima volcano in Kagoshima Prefecture, multiple witnesses reported triangular and rhomboidal luminous formations appearing above the crater during eruptions. A local photographer captured images confirmed by the meteorological observatory as unaltered. Volcanic physics specialists noted that while volcanic lightning is a known phenomenon, its repeated appearance in consistent geometric shapes is not explained by standard eruption physics.
Details
Sakurajima, a highly active stratovolcano in Kagoshima Bay, recorded more than twenty explosive eruptions from its Minamidake summit crater in March 2024. Volcanic lightning accompanying eruptions is a documented natural phenomenon. The luminous formations reported this month, however, had a character distinct from the irregular discharge patterns of standard volcanic lightning.
On the night of March 5, several Kagoshima city residents reported triangular light outlines appearing within the illuminated eruption plume. A photographer monitoring the volcano from a city viewpoint captured photographs in rapid succession showing what he described as a rhomboidal luminous object within the smoke column. The images were submitted to the Kagoshima Meteorological Observatory, which confirmed no evidence of digital alteration.
Further reports on March 12 and 23 described the same basic phenomenon. The March 12 witness stated: "Every time an eruption cloud went up, a triangle of light appeared and disappeared within ten to twenty seconds." The March 23 witness initially mistook the object for a star before observing it move in sync with an eruption. No corresponding radar returns were recorded at Kagoshima Airport.
A volcanology specialist commented: "Volcanic lightning can exhibit edge-defined shapes at cloud boundaries, but its typical expression is irregular discharge. A consistent triangle or rhombus appearing repeatedly across separate eruptions is difficult to explain with standard volcanic lightning models." The specialist emphasized that additional instrumental data would be required for meaningful analysis.
The Bureau acknowledges that geometric pattern perception in long-distance photographs of complex atmospheric phenomena (pareidolia) is a known cognitive effect. Objective analysis of the photographic data has been requested from an independent imaging laboratory.
Timeline
- March 5, 2024 — nightTriangular light outline in eruption plume. Photographer captures rhomboidal luminous object. Images confirmed unaltered.
- March 12, 2024Multiple witnesses describe triangular light appearing with each eruption, lasting 10–20 seconds.
- March 23, 2024Rhomboidal light observed moving in sync with eruption. No airport radar return.
- April 2024Volcanology specialist comments: consistent geometric shape across eruptions is atypical for volcanic lightning.
- April 2024 onwardIndependent photographic analysis requested. Pareidolia hypothesis included in review.
- PresentAnalysis results pending. Observatory continues collecting monitoring data.
Witness Testimony
Local photographer (male, 30s)"When I saw the rhomboidal light in the smoke, I thought my camera was malfunctioning. But it was in the photo. The observatory said there was no forgery. They also said they had no explanation."
Kagoshima resident (female, 40s)"When the eruption happened at night, a triangular light appeared in the smoke. It happened two or three times. I'm used to Sakurajima's eruptions, but I had never seen a light like that. A neighbor saw it too."
Volcanology researcher (male, 50s)"Volcanic lightning is established. But a triangle or rhombus appearing repeatedly is not normal. With instrument data I could analyze it, but witness reports alone are insufficient. Additional observation is needed."
Kyu's Analysis
Geometric light with each eruption. Volcanic lightning is irregular. There is no reason for consistent shapes to repeat.
