Mt. PinatuboMt. Pinatubo

By: KirstiBy: Kirsti

MaxMax

ShelbyShelby

Mt. Pinatubo

Random Facts

• Location: Luzon, Philippines

• Type: Stratovolcano • One of the chain of

composite volcanoes • 1,745 meters before

eruption• 1,485 meters after

eruption

Events Before EruptionEvents Before Eruption

• March 15 -small earthquakes• April 2 -phreatic eruptions (water and

magma interact producing violent explosions of steam and pulverized rocks)

• Volcanic activity increases throughout April and June (ashfall, sulfur dioxide emission)

• June 3-14 – first magmatic eruptions occurred

– Formation of a lava dome

– eruptions caused tephra fall, lightning, and pyroclastic flows(4 km)

– Evacuation of people started June 7th

• June 15 –main eruption

Pyroclastic flows Pyroclastic flows reaching as far as 16 kmreaching as far as 16 km

Tephra fall reaching as Tephra fall reaching as far as Vietnam, far as Vietnam, Cambodia, and MalaysiaCambodia, and Malaysia

Typhoon rains mixed Typhoon rains mixed with ash deposits with ash deposits making laharsmaking lahars

The ash cloud covered The ash cloud covered 50,000 sq. miles50,000 sq. miles

Main Eruption June 15

Before

After

•Dormant for 635 years•Second largest eruption of 20th century •Had an effect on global weather (temp. dropped .9 degrees F)•10,000 were homeless•58,000 people were evacuated•Total death toll:800

Notable Statistics

After main eruptionAfter main eruption

Volcanic activity continued till 1992Volcanic activity continued till 1992 Ash eruptions Ash eruptions

1992: 1992: Formation of Crater LakeFormation of Crater Lake Lava Dome grew in CalderaLava Dome grew in Caldera

Crater Lake partly drowned in 2001Crater Lake partly drowned in 2001

Remains of a 2 by Remains of a 2 by 3 mile caldera are 3 mile caldera are still standing todaystill standing today

Agriculture was Agriculture was destroyed by the destroyed by the pyroclastic flow pyroclastic flow and tephraand tephra