College of Engineering, Architecture and
Technology
ASSIGNMENT NO. 1
IN
WATER RESOURCES ENGINEERING
(CE 521)
JULUIS A. ARCEÑO JR.
BSCE - 5
Mayon Volcano
Mayon Volcano known as Mount Mayon or Mount
Magayon, is a sacred and active stratovolcano in the
province of Albay in Bicol Region, on the large island of
Luzon in the Philippines. It is one of the tourist spots in
Bicol Region. Renowned for its ‘‘perfect cone’’ because of
its symmetric conical shape.
Mayon is the main landmark and highest point of the province of Albay in the whole Bicol region in the
Philippines, rising 2,462 meters and is capped by a small summit crater 200 m in diameter and it has a
base of 130 km in circumference.Mayon eruptions produce lava flows, pyroclastic flows and mud flows
which threaten populations at the base of the volcano. A 6 km radius permanent danger zone is in the
place around the volcano. This is due to the possibility of sudden phreatic eruptions and rock falls from
the upper and middle slopes of the volcano. The volcano is geographically shared by the cities and
municipalities of Legazpi City, Daraga, Camalig, Guinobatan, Ligao City, Tabaco City, Malilipot and
Santo Domingo ( clockwise from Legazpi), which divided the cone like slices of a pie when viewing a
map of their political boundaries.
Volcanoes are formed when magma from within the Earth’s upper mantle works its way to the surface.
At the surface, it erupts to form lava flows and ash deposits. Overtime as the volcano continues to erupt,
it will get bigger and bigger. When magma rises to the surface of the earth, which causes bubbles of gas
to appear in it. This gas can cause pressure to build up in the mountain, and it eventually explodes.
When the magma bursts out of the earth, it is called lava.
RECORDED ERUPTIONS
The perfect shape was formed through layers of lava and pyroplastic surges from erosion and past
eruptions. It has a small crater and the upper slopes are steep with an average of 35 to 40 degrees.
Lava flowed the Mayon slopes and rained fire which destroyed trees, rivers and streams around the
volcano. Mayon Volcano had a long story of destructive eruptions, erupting over 52 times in the past 500
years. Historical observations accounted its first eruption in1616.
2018,2014,2013,2009,2008,2006,2004,2003,2002,2001,1993,1984,1978,1968,1947,1943,1941,1939,
1938,1928,1900,1897,1896,1895,1893,1891,1890,1888,1886,1885,1881,1876,1873,1872,1871,1868,
1863,1862,1861,1860,1859,1858,1857,1855,1853,1851,1846,1845,1839,1834,1827,1814,1811,1800,
1766,1616.
LAHAR AT MAYON VOLCANO, ALBAY, PHILIPPINES
February 1,1814 Pyroclastic flow from a Plinian eruption
razes towns Cagsawa, Budiao, Camalig, Albay, Guinobatan
and Balusan, then followed by rain- induced lahars that
buried homes and the Casagwa Church killing 1200 people.
July 25, 1897 about 350 people died from hot, glowing
avalanches especially at the town of Libog and rain induced
lahars along Bulawan River.
September 29, 2006 Typhoon Milenyo (Xangsane)
mobilized the 2000 – 20003 eruption deposits and sent
lahars to the village of Padang destroying houses. No
deaths reported.
