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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 35-40 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 fr
om 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: 314.1 km² (estimated from 62.8 km b
ase 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. 1814 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 entr
ained 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 unsta
ble rocks at or near the summit.
MUNICIPALITIES WITHIN 15 KM OF MAYON 'S SUMMIT CRATER:
MUNICIPALITY
POPULATION
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
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