Kīlauea Episode 56
Mayon Alert Level 3

Kīlauea's Episode 56 ended on 5 November after nearly six hours of lava fountaining, while the Philippines continues to monitor Mayon at Alert Level 3 following a short explosive eruption on 30 October. This report uses the latest identifiable official statements and keeps older observation dates explicit.

🇺🇸 Kīlauea WATCH · ORANGE

Episode 56 of the ongoing Halemaʻumaʻu eruption began at 12:10 pm Hawaiʻi Standard Time on Thursday 5 November. The Hawaiian Volcano Observatory initially observed fountains around 100 feet (30 metres) high. Within hours, fountains reached approximately 660 feet (200 metres), while the eruption plume reached about 18,000 feet (5,500 metres) above sea level.

HVO confirmed that lava fountaining ended abruptly at 6:01 pm HST, making the episode just under six hours long. Later HVO short messages estimated approximately 6 million cubic metres (8 million cubic yards) of lava erupted, with the Uēkahuna tiltmeter recording around 17 microradians of deflation. Inflation resumed after fountaining stopped.

All vents and lava flows remained inside Halemaʻumaʻu crater, within Hawaiʻi Volcanoes National Park. Ash, tephra and Pele's hair presented downwind hazards; HVO reported light tephra fall at the Footprints area and Pāhala. The latest available HVO notice retains WATCH/ORANGE, reflecting the ongoing episodic eruption rather than continuous high fountaining.

🇵🇭 Mayon Alert Level 3

PHIVOLCS reports that a moderately explosive eruption occurred at Mayon's summit crater at 11:53 am Philippine time on 30 October. The event lasted approximately six minutes, producing a rapidly rising ash column that reached 3 kilometres above the crater and drifted southwest.

Parts of the dense lower eruption column collapsed, generating pyroclastic density currents that travelled approximately 1.5–2 kilometres down the upper slopes between the Bonga and Basud gullies. These fast-moving mixtures of hot gas, ash and rock are particularly dangerous because they can travel rapidly down valleys.

In its 6 November volcanic activity report, PHIVOLCS confirms Alert Level 3 remains in effect. Entry into the six-kilometre permanent danger zone is prohibited, and communities within or immediately beside that zone must be evacuated. The agency also warns of further explosive eruptions, ashfall and rain-triggered lahars.

🇮🇹 Stromboli INGV monitoring update

INGV's Catania observatory issued a multidisciplinary activity communication for Stromboli on 2 November at 12:50 UTC, followed by a notice on 3 November at 08:30 UTC indicating that the monitored parameters had returned to levels associated with normal activity.

The notices confirm a short-lived change in monitored conditions, but their listing alone does not establish the precise eruptive mechanism. This report therefore does not describe a new lava overflow or explosion without a supporting event description. INGV's thermal monitoring shows a maximum weekly thermal anomaly of 81.17 MW on 2 November, although poor weather affected some satellite observations.

🇺🇸 Great Sitkin WATCH · ORANGE

The Alaska Volcano Observatory's 5 November daily update states that lava likely continues to erupt slowly inside Great Sitkin's summit crater. A few small earthquakes were detected, while cloud cover obscured other satellite and webcam views.

The eruption has been ongoing since July 2021, gradually filling much of the summit crater and extending into valleys below. AVO reports no explosions since May 2021. The volcano remains at WATCH/ORANGE; this is a continuing effusive eruption, not a newly confirmed explosive event.

🇮🇸 Svartsengi / Reykjanes Continued uplift

The Icelandic Meteorological Office's latest substantive assessment, dated 27 October, reports relatively steady ground uplift at Svartsengi and low seismic activity along the Sundhnúkur crater row. Deformation measurements indicate that pressure continues to build in the underground magma accumulation zone.

IMO considers another magma intrusion, potentially followed by an eruption, the most likely future scenario, but no eruption is reported in that assessment. The assessment does not establish a date for any future event. We have not carried forward older magma-volume figures as if they were new measurements for this week.