Kanlaon, Philippines : a steam explosion from Kanlaon’s summit crater occurred.

Kanlaon, Philippines : a steam explosion from Kanlaon’s summit crater occurred.

This is a notice for the raising of the Alert Level for Kanlaon Volcano (10.41167°N, 123.13167°E) from Alert Level 0 to Alert Level 1.

At 9:55 P.M. yesterday (November 23, 2015), a steam explosion from Kanlaon’s summit crater occurred for approximately 8 minutes based on visual observation. The event was recorded by the Kanlaon Volcano seismic network as an explosion signal beginning at 9:30 P.M. and lasted 30 minutes. The explosion produced a 1.0 – 1.5 kilometer-high white plume above the summit before drifting towards the southwest. Audible rumbling sound was heard in Sitio Mananawin and Sitio Upper Pantao, Brgy. Pula, Canlaon City, Negros Oriental. Only four (4) volcanic earthquakes had been recorded during the past week by the Kanlaon Network, but after the explosion, the network recorded volcanic tremor that lasted for five (5) hours. Continuous emission of steam with minor ash from the summit crater has been observed this morning, while previously there was none.

Alert Level 1 status now currently prevails over Kanlaon Volcano, which means that it is at an abnormal condition and has entered a period of unrest. The local government units and the public are strictly reminded that entry into the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited due to the further possibilities of sudden and hazardous steam-driven or phreatic eruptions. 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 (also spelled Canlaon), the most active of the central Philippines, forms the highest point on the island of Negros. The massive 2435-m-high andesitic stratovolcano is dotted with fissure-controlled pyroclastic cones and craters, many of which are filled by lakes. The largest debris avalanche known in the Philippines traveled 33 km to the SW from Kanlaon. The summit of Kanlaon contains a 2-km-wide, elongated northern caldera with a crater lake and a smaller, but higher, historically active vent, Lugud crater, to the south. Historical eruptions from Kanlaon, recorded since 1866, have typically consisted of phreatic explosions of small-to-moderate size that produce minor ashfalls near the volcano

November 23, 2015. Kanlaon, Philippines :

Source :DOST-PHIVOLCS, GVP.

Photos : thousandwonders.net

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