Mayon Volcano Philippines Mayon has the classic conical shape of a stratovolcano. It is the most active volcano in the Philippines. Since 1616, Mayon.

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Presentation transcript:

Mayon Volcano Philippines

Mayon has the classic conical shape of a stratovolcano. It is the most active volcano in the Philippines. Since 1616, Mayon has erupted 47 times. The beautifully symmetrical Mayon volcano, which rises to 2,460 meters above the Albay Gulf, is the Philippines' most active volcano. The structurally simple volcano has steep upper slopes that average degrees and is capped by a small summit crater.

PHYSICAL CHARACTERISTICS: LOCATION: LOCATION: ALBAY PROVINCE, 300 km SE of Manila (13°15.4'N - 123°41.1'E) Height: 2,460 m Base Circumference: 62.8 km (reckoned from 10-km radius) encompassing the towns of Camalig, Malilipot and Sto. Domingo Type of Volcano: Stratovolcano or Composite Volcano, composed of a sequence of pyroclastic and lava flows Composition of Lava: Andesitic Areas: km² (estimated from 62.8 km base circumference)

HISTORICAL ERUPTIONS: No. of Recorded Eruptions: 47 since 1616 Latest Eruption: 24 June & 26 July 2001 (Strombolian & Vulcanian types) Most Destructive Eruption: 01 February 1814; 1,200 people perished due to lahars Eruption Types: Strombolian - quiet emission of lava (e.g. 1978, 1st phase of 1984 eruption) Vulcanian - violent explosions and eruptions of pyroclastic flows (e.g. 1st phase of 1968 eruption, 2nd phase of 1984 eruption) Plinian - extremely violent explosions with continous sustained ejection of pyroclasts (e.g eruption)

Precursors to Eruptions: Increase in seismicity level (Background: 0-10 volcanic quakes per day) Ground tilt due to magma intrusion Change in color of steam emission from white to gray due to entrained ash Increase in the volume of steam emission Crater glow due to presence of magma at or near the crater Rumbling sounds because of gas explosion Rockfalls and landslides caused by the rising magma and unstable rocks at or near the summit.

MUNICIPALITIES WITHIN 15 KM OF MAYON 'S SUMMIT CRATER: MUNICIPALITY POPUL ATION NO. OF HOUSEHOLD Bacacay 49,202 8,864 Camalig 49,975 9,216 Daraga 83,928 15,551 Guinobatan 58,926 10,884 Legazpi City 121,116 22,222 Ligao 72,560 13,070 Malilipot 24,160 4,555 Sto. Domingo 22,939 4,186 Tabaco 85,476 15,140

Mount Mayon, Eruption March 2000