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Mt. Pinatubo Eruption on June 15, 1991

The second-largest volcanic eruption of the 20th century, and by far the largest eruption to affect a densely populated area, occurred at Mount Pinatubo in the Philippines on June 15, 1991. The eruption produced high-speed avalanches of hot ash and gas, giant mudflows, and a cloud of volcanic ash hundreds of miles across. This animation shows the ozone measurements around Mt Pinatubo reacting to the eruption. That "hole" in the days immediately following the eruption of Pinatubo is due to interference by sulfur dioxide with the retrieval algorithm. There are high amounts of volcanic SO2 in the initial plume from the eruption. These measurements make it look like there was an ozone hole when there was not. Ozone really did decrease in the equatorial zone after the volcanic cloud spread throughout the equatorial zone over the next year or so. Plots of global average ozone show a clear minimum in the two years after the eruption. But that "hole" on June 20th for instance is sulfur dioxide, not an ozone hole.
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Mt. Pinatubo Eruption caused Equatorial Ozone Hole    Mt. Pinatubo Eruption caused Equatorial Ozone Hole
Duration: 1.3 minutes
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Normal Equatorial Ozone    Normal Equatorial Ozone

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June 16, 1991 : One day after Mt Pinatubo erupted    June 16, 1991 : One day after Mt Pinatubo erupted

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June 17, 1991    June 17, 1991

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June 18, 1991    June 18, 1991

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June 19, 1991    June 19, 1991

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June 20, 1991    June 20, 1991

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June 21, 1991    June 21, 1991

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June 21, 1991    June 21, 1991

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June 23, 1991    June 23, 1991

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June 24, 1991    June 24, 1991

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June 25, 1991    June 25, 1991

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August 31, 1991 Subtle equatorial ozone decrease seen in blue    August 31, 1991 Subtle equatorial ozone decrease seen in blue

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Video slate image reads,    Video slate image reads, "Mt. Pinatubo Eruption effect on Equatorial ozone".

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Short URL to This Page:http://svs.gsfc.nasa.gov/goto?2183
Animation Number:2183
Completed:2001-06-18
Animator:Lori Perkins (NASA/GSFC) (Lead)
Scientists:Richard McPeters (NASA/GSFC)
 Jay Herman (NASA/GSFC)
Platform/Sensor/Data Set:Nimbus-7/TOMS/Ozone (1991/06/16 - 1991/06/30)
Data Collected:1991/06/16 - 1991/06/30
Series:Mt. Pinatubo
Video:SVS2001-0021 *
Please give credit for this item to:
NASA/Goddard Space Flight Center
Scientific Visualization Studio
 
Keywords:
DLESE >> Atmospheric science
SVS >> Mt. Pinatubo
DLESE >> Natural hazards
SVS >> Ozone
SVS >> Volcano
 
 


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Many of our multimedia items use the GCMD keywords. These keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 8.0.0.0.0

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