A week of two live stories and one building in the background. Piton de la Fournaise is back — three days after stopping, the same cone on the south-southeast flank relit on 28 March and OVPF's 1 April bulletin confirms it is still going, with both shallow and deep sources simultaneously inflating. Meanwhile Kīlauea sits at 21.2 microradians of accumulated tilt, both vents are glowing strongly and continuously overnight, and Episode 44 is very close.
Piton paused for three days, then restarted at the same vent. OVPF frames this as a continuation of the eruption that began 13 February — not a new event. Both shallow and deep GNSS sources are inflating simultaneously. The volcano has erupted three times in 2026 and the deep system is clearly still loaded.
🇷🇪 Piton de la Fournaise Alert 2-2 · Active
After a pause of just three days — between 25 March at 4:30 PM local time and 28 March at approximately 3:00 PM — OVPF-IPGP confirmed the eruption that began on 13 February 2026 had resumed at the same eruptive cone on the south-southeast flank. The 1 April OVPF daily bulletin confirms activity is ongoing. Only the main southern lava flow is currently being replenished, with minor lava projections at the cone and gradual stabilisation of eruptive tremor following the resumption.
The 1 April bulletin also reports that both summit GNSS stations — indicating pressurisation of a shallow source — and far-field GNSS stations — indicating pressurisation of a deep source — are recording inflation simultaneously. CO₂ ground emissions at monitoring stations on the western flank continue on a long-term upward trend consistent with the broader volcanic reactivation phase throughout 2026. The RN2 coastal road, severed by lava on 13 March, remains closed. The eruption has now produced an estimated 20–25 million cubic metres of lava in total, built an 8-hectare lava platform at the ocean entry, and reached the Indian Ocean for the first time in 19 years.
🇺🇸 Kīlauea Watch · Orange
The Halemaʻumaʻu eruption is paused between episodes but the system is charging. HVO's 1 April daily update reports that both the north and south vents glowed strongly and nearly continuously overnight — the most sustained vent glow of the current repose period. Summit tiltmeters UWD and SMC continue to record inflation: 21.2 microradians of inflationary tilt have accumulated since the end of Episode 43, with a gain of approximately one microradian in the 24 hours to 1 April. Seismic tremor is continuous. HVO's Episode 44 forecast window is 6–14 April.
HVO's monitoring network has largely recovered from storm and power outage-related disruptions, though the SDH tiltmeter remains offline. Episode 43, which occurred on 10 March, produced the highest lava fountains of the entire eruption cycle at approximately 540 metres, and sent tephra as far as 80 km downwind. The eruption has been producing episodic fountaining from north and south vents in Halemaʻumaʻu since 23 December 2024.
🇵🇭 Mayon Alert 3 · Intensified
Now past 85 consecutive days of effusive eruption with no meaningful sign of easing. Per the GVP/Smithsonian Weekly Volcanic Activity Report for the week ending 25 March — the most recent published at time of writing — the eruption continued with lava effusion and summit dome collapses, pyroclastic density currents, incandescent rockfalls, and ash plumes rising as high as 1.5 km above the summit drifting mainly northwest, west, and southwest. The seismic network recorded 262–412 daily rockfalls, 4–19 daily pyroclastic density currents, and 128–271 daily volcanic earthquakes. Daily SO₂ emissions averaged 1,132–4,352 tonnes per day. Lava flow lengths remain stable: 3.8 km in the Basud Gully, 3.2 km in Bonga, and 1.3 km in Mi-isi, with no advancement.
🇵🇭 Bulusan Alert 1 · Unrest
A new entry on the watchlist. Per the GVP/Smithsonian WVAR for the week ending 25 March, PHIVOLCS reported 475 volcanic earthquakes at Bulusan during 15–22 March — mostly weak volcano-tectonic events associated with rock fracturing at shallow depths. PHIVOLCS noted directly that the signal characteristics are similar to the seismicity that preceded the June 2022 and April 2025 eruptions at this volcano. Ground deformation data recorded inflation of the western and southeastern flanks. The Alert Level was raised to 1 at 1200 on 22 March, with seismicity continuing at 19–55 daily earthquakes through 25 March.
This is a phreatic unrest pattern driven by shallow hydrothermal processes. Steam-driven eruptions can occur at Bulusan with little further warning. The 4 km permanent danger zone and 2 km extended danger zone on the SE flank are in force.
🇺🇸 Great Sitkin Watch · Orange
Slow lava effusion within the summit crater continues — this eruption has been running since July 2021. USGS AVO's 31 March update reports numerous rockfalls detected and elevated surface temperatures observed in satellite data, with very low seismic activity. The lava has filled most of the summit crater and advanced into adjacent valleys. No explosions since May 2021.
📡 What to watch next week
Kīlauea Episode 44 is the main event — the forecast window opens Sunday 6 April. Both vents are glowing strongly, tilt is gaining around one microradian per day, and HVO's network is recovered. Watch for a sharp deflationary spike on the UWD tiltmeter — when that happens, fountaining begins within hours. Piton de la Fournaise is the other story to follow — both shallow and deep sources are pressurising simultaneously just days after the restart. A continuation or escalation of activity is entirely plausible. Bulusan is the new name to track: 475 earthquakes in seven days matching pre-eruption patterns from 2022 and 2025 — any escalation to Alert Level 2 or first ash emission would be significant.