Steam Explosion Observed in Mayon Volcano

Mayon Volcano emitted ashes up to 500 meters above the summit caused by a small phreatic event that lasted for about 73 seconds at around Tuesday, 8:00 AM, May 7, 2013. Phreatic events occur when magma heats the ground or surface water causing an explosion of steam. It lets out steam trapped overtime.

According to the PHIVOLCS advisory, as of 8:30 A.M. today, no volcanic earthquake was detected within the past 24-hour observation period. Seismic and gas emission parameters remained within background levels and indicate no intensification of volcanic activity.

As of now, PHILVOCS is maintaining an Alert level 0 which means there is no new magma coming out of the crater. However, small phreatic explosions, including small steam and ash emission may transpire with little or no warning at all.

The public is strongly advised to refrain from entering the six-kilometer radius Permanent Danger Zone (PDZ) to avoid the risk of sudden steam driven eruptions and rock falls from the upper and middle slopes of the volcano.

The steam column produced in the steam explosion was mainly composed of water. Old ashes from the crater were carried by the steam as it ejected from the crater.
The wind is now driving the ashes towards the 3rd district of Albay, consisting Guinobatan, Jovellar, Libon, Oas, Polangui, Pio Duran and Ligao City.

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