Updates on volcanic activity (Smithsonian)
The Smithsonian/USGS Weekly Volcanic Activity Report provides information about global volcanism on a weekly basis. Latest Mayon report has been published on 30 Apr 2026 09:42.
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported that the eruption at Mayon continued during 21-29 April, characterized by lava effusion, pyroclastic density currents (PDCs), incandescent rockfalls, ash-and-gas plumes, and occasional minor Strombolian activity. Emissions were visible daily, rising as high as 1.5 km above the summit and drifting in multiple directions. Each day the seismic network recorded 195-281 rockfalls, 0-2 PDCs, and 12-62 volcanic earthquakes. The earthquake counts included 8-35 daily periods of volcanic tremor, each lasting between one minute to two hours and 39 minutes. Near daily measurements of sulfur dioxide emissions averaged 815-3,434 tonnes per day. The lava flows did not advance in the Basud (E) and Bonga (SE) drainages, remaining 3.8 and 3.2 km long, respectively. The lava flow in the Mi-isi (S) drainage advanced 300 m during 24-25 April to a total length of 1.6 km. Minor Strombolian activity and short periods of lava fountaining were recorded daily. The Alert Level remained at 3 (on a 0-5 scale) and residents were reminded to stay away from the 6-km-radius Permanent Danger Zone (PDZ). PHIVOLCS recommended that civil aviation authorities advise pilots to avoid flying close to the summit.
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
See the detail here
