REMEMBERING THE HISTORIC ERUPTION OF MOUNT PINATUBO, THE PHILIPPINES JUNE 12, 1991 - PowerPoint PPT Presentation

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REMEMBERING THE HISTORIC ERUPTION OF MOUNT PINATUBO, THE PHILIPPINES JUNE 12, 1991 PowerPoint Presentation
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REMEMBERING THE HISTORIC ERUPTION OF MOUNT PINATUBO, THE PHILIPPINES JUNE 12, 1991

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REMEMBERING THE HISTORIC ERUPTION OF MOUNT PINATUBO, THE PHILIPPINES JUNE 12, 1991
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REMEMBERING THE HISTORIC ERUPTION OF MOUNT PINATUBO, THE PHILIPPINES JUNE 12, 1991

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  1. REMEMBERING THE HISTORIC ERUPTION OF MOUNT PINATUBO, THE PHILIPPINESJUNE 12, 1991 THE SECOND LARGEST ERUPTION OF THE 20TH CENTURY Walter Hays, Global Alliance for Disaster Reduction, University of North Carolina, USA

  2. MOUNT PINATUBO: QUIET FOR 450-500 YEARS BEFORE ERUPTING

  3. VOLCANO HAZARDS (AKA POTENTIAL DISASTER AGENTS) • VERTICAL PLUME • LAVA FLOWS • LATERAL BLASTS • LAHARS • EARTHQUAKES (related to movement of lava)

  4. NATURAL HAZARDS FOR WHICH EVACUATION IS TYPICAL FLOODS GOAL: MOVE PEOPLE OUT OF HARM’S WAY HURRICANES TYPHOONS HIGH BENEFIT/COST FOR SAVING LIVES, BUT LOW BEMEFIT/COST FOR PROTECTING PROPERTY TSUNAMIS VOLCANIC ERUPTIONS WILDFIRES

  5. SOURCE OF PHOTOGRAPHS USGS US AIR FORCE PHILVOS

  6. MOUNT PINATUBO’S FIRST PRECURSORS OF THE ERUPTION

  7. PHILVOS: MONITORING GROUND SWELLING (ANOTHER PRECURSOR)

  8. MOUNT PINATUBO: VERTICAL PLUME REACHES 19 KM: JUNE 12

  9. LOURDES DESTROYED BY LAHARS WITHIN HOURS AFTER THE ERUPTION

  10. MOUNT PINATUBO BLOWS ITS TOP: JUNE 15, 1991

  11. THE JUNE 15TH CALDERA COLLAPSE LOWERED PINATUBO’S ELEVATION 1,000 FT

  12. LATERAL BLAST: 5:55 AM, JUNE 15

  13. CARS COVERED WITH VOLCANIC ASH: JUNE 16

  14. DC-10 AT CLARK AIR FORCE BASE COVERED WITH ASH: JUNE 17

  15. CLARK AIR FORCE COVERED WITH ASH: JUNE 24

  16. RIVER WIDENED BY LOCAL FLOODING AND LAHARS

  17. The eruption ejected roughly 10 billion metric tons (10 cubic km) of magma, and 20 million tons of sulfur dioxide.

  18. The eruption injected large amounts of aerosols into the stratosphere – more than any eruption since that of krakatoa in 1883.

  19. Lahars that occurred immediately after the eruption, and rejuvenated during subsequent rainy seasons, have destroyed over 100,000 homes.

  20. Global temperatures dropped by about 0.5 degree C.