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 09 Jul 2026 08:29.
The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported that the eruption at Mayon continued during 2-8 July, characterized by lava effusion, periodic pyroclastic density currents (PDCs), incandescent rockfalls, and occasional ash-and-gas plumes. Emissions were visible daily rising 100-750 m above the summit and drifting WSW and SW. Each day the seismic network recorded 166-357 rockfalls and 3-34 volcanic earthquakes. The earthquake counts included eight periods of volcanic tremor, each lasting 18-26 minutes on 2 July and one one-minute-long tremor on 7 July. Daily measurements of sulfur dioxide emissions averaged 2,026-2,184 tonnes per day. One PDC per day was detected on 5 and 7 July. The lava flows did not advance in the Mi-isi (S), Basud (E), and Bonga (SE) drainages, remaining 1.8, 3.8, and 3.2 km long, respectively.
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
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