09 Pebrero 2022
KANLAON VOLCANO ADVISORY
09 February 2022
DOST-PHIVOLCS is currently monitoring localized earthquake activity on the lower northwest flank of Kanlaon Volcano, in the jurisdiction of Bago City, Negros Occidental, that began at 8:12 PM on February 8, 2022. As of 9:00 AM today, a total of eleven (11) very shallow earthquakes ranging in strength from ML0.9 to ML2.1 were recorded by the Kanlaon Volcano Network (KVN). In addition, ground deformation data from continuous GPS measurements indicate slight inflation of the middle to upper edifice since mid-October 2021, while short-term deflation since December 2021 and January 2022 was recorded by EDM and electronic tilt monitoring, respectively, on the southeastern flanks. In contrast, sulfur dioxide or SO2 emission from the summit crater remains within baseline levels, averaging 387 tonnes/day since October 2021. SO2 emission was measured at only 138 tonnes/day on 3 February 2022; there is no visible degassing activity from the crater at present. Overall, localized shallow seismic activity and short-term ground deformation are likely caused by shallow hydrothermal or geothermal processes beneath the edifice that could generate phreatic or steam-driven explosions.
DOST-PHIVOLCS would like to remind the public that Kanlaon Volcano is at Alert Level 1, which means that it is in at low-level unrest. The local government units and the public are strongly reminded that entry into the 4-kilometer radius Permanent Danger Zone (PDZ) must be strictly prohibited due to the further possibilities of sudden and hazardous steam-driven or phreatic eruptions. Furthermore, residents on the lower slopes of Kanlaon are advised to report any unusual observations to their local officials or to the Kanlaon Volcano Observatory* at La Carlota City, Negros Occidental. Civil aviation authorities must also advise pilots to avoid flying close to the volcano’s summit as ejecta from any sudden phreatic eruption can be hazardous to aircraft. DOST-PHIVOLCS is closely monitoring Kanlaon Volcano’s activity and any new development will be relayed to all concerned.
*Kanlaon Volcano Observatory-La Carlota City: +639152854895