Report on Mayon (Philippines) — 12 October-18 October 2022
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 12 October-18 October 2022
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2022. Report on Mayon (Philippines) (Sennert, S, ed.). Weekly Volcanic Activity Report, 12 October-18 October 2022. Smithsonian Institution and US Geological Survey.
13.257°N, 123.685°E; summit elev. 2462 m
All times are local (unless otherwise noted)
PHIVOLCS reported that white steam plumes from Mayon rose no higher than 500 m above the summit and drifted E. Sulfur dioxide emissions averaged 301 tonnes per day on 12 October. One volcanic earthquake was detected during 16-17 October. Electronic Distance Measuring (EDM), precise leveling, continuous GPS, and electronic tilt monitoring data showed that the volcano had been slightly inflated, especially on the NW and SE flanks, since 2020. The Alert Level remained at 2 (on a 0-5 scale) and the public was reminded to stay outside of the 6-km-radius Permanent Danger Zone.
Geological Summary. Symmetrical Mayon, which rises above the Albay Gulf NW of Legazpi City, is the most active volcano of the Philippines. The steep upper slopes are capped by a small summit crater. Recorded eruptions since 1616 CE range from Strombolian to basaltic Plinian, with cyclical activity beginning with basaltic eruptions, followed by longer term andesitic lava flows. Eruptions occur predominately from the central conduit and have also produced lava flows that travel far down the flanks. Pyroclastic flows and mudflows have commonly swept down many of the approximately 40 ravines that radiate from the summit and have often damaged populated lowland areas. A violent eruption in 1814 killed more than 1,200 people and devastated several towns.