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Awu raised to Level 3; Popocatepetl ash and Mayon tremor mark a busy day

An alert hike in Indonesia stood out today amid steady activity across several regions. Awu was raised to Level 3 - Standby, while ash was reported at Popocatepetl and Sabancaya but not at Sangay compared with yesterday. In Indonesia, Dukono and Ibu produced triple-digit daily explosions, and Mayon in the Philippines showed frequent rockfalls and tremor.

United States
At great sitkin (https://volcano.si.edu/great-sitkin/news.html) (Watch / Aviation ORANGE), the long-running eruption persisted without notable changes, while kilauea (https://volcano.si.edu/kilauea/news.html) stayed in eruptive pause (Advisory / Aviation YELLOW). Low-level unrest continued at shishaldin (https://volcano.si.edu/shishaldin/news.html) and kupreanof (https://volcano.si.edu/kupreanof/news.html) (both Advisory / Aviation YELLOW).

Indonesia
A marked development came at awu (https://volcano.si.edu/awu/news.html), where the alert was raised to Level 3 - Standby. Explosive activity was vigorous at dukono (https://volcano.si.edu/dukono/news.html) (~190 explosions; plumes to 3 km) and ibu (https://volcano.si.edu/ibu/news.html) (~119 explosions; plumes to 800 m), and semeru (https://volcano.si.edu/semeru/news.html) logged 53 explosions with plumes to 1 km. At merapi (https://volcano.si.edu/merapi/news.html), numerous rockfalls and a PDC signal were recorded, while lewotobi (https://volcano.si.edu/lewotobi/news.html) produced low gas plumes with LF and gas-emission quakes and lewotolok (https://volcano.si.edu/lewotolo/news.html) saw two rockfalls. Unrest persisted at several others across the arc, while Ijen and Tangkuban Parahu were assessed at normal background levels.

Philippines
At mayon (https://volcano.si.edu/mayon/news.html) (Alert Level 3), activity included plumes to 400 m, frequent rockfalls and tremor, three PDC-related signals, crater glow, and SO2 averaging 658 t/d; deformation showed short-term deflation with localized NE-flank inflation. Eruptive unrest persisted at kanlaon (https://volcano.si.edu/canlaon/news.html) (Alert Level 2), and low-level unrest at bulusan (https://volcano.si.edu/bulusan/news.html) featured a 100 m plume, 252 volcanic earthquakes, and inflationary deformation; taal (https://volcano.si.edu/taal/news.html) remained at Alert Level 1.

Mexico
Mexico’s popocatepetl (https://volcano.si.edu/popocatepetl/news.html) produced ash-and-gas plumes and 198 low-intensity exhalations with brief tremor; a M1.6 VT quake was recorded (Yellow Alert - Phase 2).

South America
Peru’s sabancaya (https://volcano.si.edu/sabancaya/news.html) emitted ash-and-gas plumes to 600 m with thermal anomalies and minor inflation (Orange Alert), while Ecuador’s reventador (https://volcano.si.edu/reventador/news.html) and sangay (https://volcano.si.edu/sangay/news.html) maintained ongoing eruptions without notable new details.

Source: smithsonian/usgs gvp daily volcanic activity report (https://volcano.si.edu/reports_daily.cfm?activitydate=2026-05-19) (19 M...

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Awu raised to Level 3; Popocatepetl ash and Mayon tremor mark a busy day

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