This roundup covers confirmed monitoring developments for the week ending 9 October 2026. Each section identifies its official source and the date of the latest material verified. An aviation advisory is not counted as a separate eruption, and no older measurements are presented as new.
🇺🇸 Kīlauea WATCH · ORANGE
Latest HVO daily update: 8 October, 18:25 UTC. HVO reports minor spattering overnight at the north vent in Halemaʻumaʻu. Both north and south vents showed strong glow and flames, with robust volcanic gas plumes visible by day. The summit remains highly pressurised, and HVO warns that fountaining, further intrusions or eruption at another summit location remain possible.
HVO located six shallow summit earthquakes in the preceding 24 hours. Uēkahuna tiltmeter readings showed approximately 1 microradian of inflation followed by similar deflation, leaving no net tilt change over the day. HVO's 7 October status report and field imagery document new ground cracks and deformation associated with the 30 September–1 October shallow intrusion. HVO says the onset of Episode 55 fountaining cannot currently be forecast; it has not announced a new fountaining episode in the latest daily update.
🇯🇵 Sakurajima Ash Advisories This Week
Official Tokyo VAAC record, checked 9 October: repeated advisories were issued for Sakurajima on 5–7 October. The sequence reached VAA 2026/275 at 14:34 UTC on 7 October. The VAAC list contains numerous advisories on 7 October, but these must not be treated as an equal number of distinct eruptions.
The official Tokyo VAAC homepage, updated 9 October at 04:00 UTC, showed no currently active volcanic ash advisories at that update. This does not mean Sakurajima has stopped all volcanic activity; it describes the aviation advisory situation only.
🇵🇭 Philippines 9 October Bulletins
PHIVOLCS has published 9 October 2026 daily bulletins for Kanlaon, Mayon, Taal and Bulusan. Its official alert-level board lists Kanlaon at Level 2, Mayon at Level 2, Taal at Level 1 and Bulusan at Level 1.
These alert levels are confirmed, but the individual numerical readings in today's bulletins could not be independently extracted in this check. No earthquake totals, sulphur dioxide rates or plume heights from previous dates have therefore been recycled as current measurements.
What to watch next
At Kīlauea, HVO says the highly pressurised summit system could produce fountaining or further intrusion, but the timing and location cannot be predicted. At Sakurajima, the latest official aviation record documents multiple advisories earlier this week, without proving continuous eruption.