Frequent explosive activity in Indonesia and Guatemala stood out today, while Hawaii’s Kilauea slipped into a pause. Popocatepetl’s ground alert shifted to Orange, and Italy’s Stromboli showed both Strombolian bursts and effusive lava.
United States
Great Sitkin (Watch / Aviation ORANGE) kept slow lava effusion inside the summit crater with weak steaming; rockfalls from the growing dome were detected. At Kilauea (Advisory / Aviation YELLOW), eruptive activity paused, but glow persisted at vents and the crater-floor flows stayed incandescent. Unrest at Shishaldin (Advisory / Aviation YELLOW) produced vapor plumes, SO2 degassing, and intermittent thermal anomalies.
Indonesia
Halmahera’s Dukono and Ibu were notably noisy, with 82 and 126 explosions respectively; ash rose up to 1.5 km at Dukono and to 600 m at Ibu. Farther south, Semeru tallied 74 explosions with ash to 800 m, while Merapi shed hot avalanches reaching 2 km and Marapi produced two explosions. On Flores and Lembata, Lewotobi and Lewotolok emitted low gas plumes and minor rockfalls. Several others were in unrest at Indonesia’s Level 2 Alert, including Krakatau, Kerinci, Raung, and more.
Philippines
At Mayon (Alert Level 3), lava effusion kept three flows active at 3.8 km (Basud), 3.2 km (Bonga), and 1.6 km (Mi-isi), with minor Strombolian bursts and numerous rockfalls; occasional PDC-related signals were recorded. Nearby, Kanlaon logged seven ash emissions with plumes to 600 m and SO2 at 1,891 t/d. Low-level unrest persisted at Taal (Alert Level 1) and Bulusan (Alert Level 1), with diffuse plumes, minor seismicity, and ongoing inflation.
Mexico
Popocatepetl shifted to an Orange alert as ash-and-gas emissions continued; a M1.5 volcano-tectonic quake was recorded.
South America
In Ecuador, Reventador and Sangay produced frequent explosions and ash plumes (to 1 km and 800 m, respectively), along with incandescent rockfalls. Peru’s Sabancaya sent ash-and-gas up to 1.2 km and showed occasional thermal anomalies.
Europe
Italy’s Stromboli (Aviation ORANGE) featured classic Strombolian bursts alongside effusive lava, with rockfalls and tremor.
Other
In Guatemala, Fuego averaged up to 13 explosions per hour, lofting ash to 937 m and throwing incandescent material with accompanying rockfalls, while Santa Maria produced up to two explosions per hour with ash to 800 m and persistent dome glow. In Costa Rica, degassing persisted at Poas, while Rincon de la Vieja and Turrialba remained at Level 2 (Warning) with Aviation Yellow.
Source: Smithsonian/USGS Daily Volcanic Activity Report for 6 May 2026.
Activity Summary for 6 May 2026
| Volcano | Country | Activity Type | Keynotes |
|---|---|---|---|
| Dukono | Indonesia | Eruption | 82 explosions; ash plumes to 1.5 km. |
| Fuego | Guatemala | Eruption | Up to 13 explosions/hr; ash to 937 m; incandescent ejecta and rockfalls. |
| Great Sitkin | United States | Eruption | Slow lava effusion in summit crater; weak steaming; rockfalls from the dome. |
| Ibu | Indonesia | Eruption | 126 explosions; ash plumes to 600 m; gas-and-steam to 200 m. |
| Kilauea | United States | Paused | Eruption paused; crater-floor lava incandescent; glow at vents, occasional flames. |
| Kanlaon | Philippines | Eruption | 7 ash emissions, 7–70 min; ash to 600 m; SO2 1,891 t/d. |
| Lewotobi | Indonesia | Eruption | Gas plumes to 100 m; single rockfall; isolated LF and gas-emission quakes. |
| Lewotolok | Indonesia | Eruption | Gas plumes to 100 m; 50 rockfalls. |
| Marapi | Indonesia | Eruption | 2 explosions detected. |
| Mayon | Philippines | Eruption | Lava effusion, flows 3.8/3.2/1.6 km; minor Strombolian bursts; numerous rockfalls, occasional PDC signals. |
| Merapi | Indonesia | Eruption | 4 hot avalanches to 2 km; 121 rockfalls. |
| Popocatepetl | Mexico | Eruption | Ash-and-gas emissions; M1.5 VT quake. |
| Poas | Costa Rica | Eruption | Gas-and-steam plumes; ongoing fumarolic activity. |
| Reventador | Ecuador | Eruption | 98 explosions; ash to 1 km; incandescent rockfalls to 1 km. |
| Sabancaya | Peru | Eruption | Ash-and-gas plumes to 1.2 km; low-level seismicity; thermal anomalies. |
| Sangay | Ecuador | Eruption | 161 explosions; ash to 800 m; incandescent rockfalls to 200 m. |
| Santa Maria | Guatemala | Eruption | Up to 2 explosions/hr; ash to 800 m; dome glow and incandescent rockfalls. |
| Semeru | Indonesia | Eruption | 74 explosions; ash to 800 m; minor rockfalls. |
| Stromboli | Italy | Eruption | Strombolian bursts with effusion; lava flow, incandescent ejecta; rockfalls and tremor. |
| Taal | Philippines | Eruption | Diffuse plumes; 2 volcanic quakes; inflation persists. |
| Awu | Indonesia | Unrest | Gas-and-steam plume to 100 m. |
| Bulusan | Philippines | Unrest | Gas-and-steam to 100 m; 10 volcanic quakes; inflation noted. |
| Bur ni Telong | Indonesia | Unrest | Ongoing unrest; Alert Level 2 – Alert. |
| Dempo | Indonesia | Unrest | Ongoing unrest; Alert Level 2 – Alert. |
| Gamalama | Indonesia | Unrest | Ongoing unrest; Alert Level 2 – Alert. |
| Karangetang | Indonesia | Unrest | Gas-and-steam to 700 m; gas-emission tremor signals. |
| Kerinci | Indonesia | Unrest | Ongoing unrest; Alert Level 2 – Alert. |
| Krakatau | Indonesia | Unrest | Ongoing unrest; Alert Level 2 – Alert. |
| Lokon-Empung | Indonesia | Unrest | Weak gas plume 25 m. |
| Raung | Indonesia | Unrest | Ongoing unrest; Alert Level 2 – Alert. |
| Rincon de la Vieja | Costa Rica | Unrest | Ongoing unrest; Level 2 – Warning; Aviation YELLOW. |
| Sangeang Api | Indonesia | Unrest | Ongoing unrest; Alert Level 2 – Alert. |
| Shishaldin | United States | Unrest | Vapor plumes; SO2 degassing; thermal anomalies. |
| Slamet | Indonesia | Unrest | Ongoing unrest; Alert Level 2 – Alert. |
| Soputan | Indonesia | Unrest | Gas-and-steam to 20 m. |
| Sorikmarapi | Indonesia | Unrest | Gas-and-steam to 30 m. |
| Turrialba | Costa Rica | Unrest | Ongoing unrest; Level 2 – Warning; Aviation YELLOW. |
| Ijen | Indonesia | Background | Gas-and-steam to 100 m. |
| Tangkuban Parahu | Indonesia | Background | Gas-and-steam emissions. |