LESSONS LEARNED FROM PAST NOTABLE DISASTERS MEXICO PART 4: VOLCANIC ERUPTIONS Walter Hays, Global...
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Transcript of LESSONS LEARNED FROM PAST NOTABLE DISASTERS MEXICO PART 4: VOLCANIC ERUPTIONS Walter Hays, Global...
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LESSONS LEARNED FROM PAST NOTABLE DISASTERS
MEXICOPART 4: VOLCANIC ERUPTIONS
Walter Hays, Global Alliance for Disaster Reduction, Vienna,
Virginia, USA
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MEXICO
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NATURAL HAZARDS THAT HAVE CAUSED NATURAL HAZARDS THAT HAVE CAUSED DISASTERS IN MEXICODISASTERS IN MEXICO
NATURAL HAZARDS THAT HAVE CAUSED NATURAL HAZARDS THAT HAVE CAUSED DISASTERS IN MEXICODISASTERS IN MEXICO
FLOODS
SEVERE WINDSTORMS
EARTHQUAKES
VOLCANIC ERUPTIONS
ENVIRONMENTAL CHANGE
GLOBAL CLIMATE CHANGE
DERIVHIGH BENEFIT/COST BY BECOMING DISASTER RESILIENT
DERIVHIGH BENEFIT/COST BY BECOMING DISASTER RESILIENT
GOAL: PROTECT PEOPLE GOAL: PROTECT PEOPLE AND COMMUNITIESAND COMMUNITIES
GOAL: PROTECT PEOPLE GOAL: PROTECT PEOPLE AND COMMUNITIESAND COMMUNITIES
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SOME OF THE 1,500 ACTIVE VOLCANOES ARE IN MEXICOSOME OF THE 1,500 ACTIVE
VOLCANOES ARE IN MEXICO
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Natural Phenomena That Cause Disasters
Planet Earth’s heat flow causes movement of lithospheric plates, which causes subduction, which causes VOLCANIC ERUPTIONS
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VOLCANOES
PART OF THE PACIFIC “RING OF FIRE,” MEXICO HAS ACTIVE VOLCANOES AS A RESULT OF COMPLEX SUBDUCTION OF
THE COCOS PLATE BENEATH THE NORTH AMERICAN PLATE
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MEXICO: THE NORTH AMERICAN AND COCOS PLATES
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MEXICO’S VOLCANOES (NOTE: POPOCATEPETL AND COLIMA)
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IMAGES OF POPOCATEPETL
MEXICO’S BEST KNOWN ACTIVE VOLCANO AND THE SECOND HIGHEST VOLCANO IN
NORTH AMERICA ERUPTED AS RECENTLY AS APRIL 17, 2013
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POPOCATEPETL AND PIRAMID DE COCHULA
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“POPO’s ERUPTION HISTORY
• In the past centuries before European came to Mexico, large eruptions produced giant mud flows that buried Aztec settlements, and even entire pyramids
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“POPO’s ERUPTION HISTORY
• After almost 50 years of dormancy, "Popo" came back to life in 1994 and has been producing powerful explosions at irregular intervals since then.
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VOLCANO HAZARDS CAN HAVE FAR REACHING IMPACTS
• VERTICAL PLUME (can affect jet aircraft)
• ASH AND TEPHRA
• LATERAL BLAST
• PYROCLASTIC CLOUDS, BURSTS, AND FLOWS
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POPOCATEPETL
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POPOCATEPETL
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VOLCANO HAZARDS CAN HAVE FAR REACHING IMPACTS
• LAVA FLOWS
• LAHARS (can bury villages)
• EARTHQUAKES (related to movement of lava)
• “VOLCANIC WINTER” (causing famine and mass extinctions)
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A DISASTER CAN HAPPENWHEN THE
POTENTIAL DISASTER AGENTS OF A VOLCANIC ERUPTION INTERACT WITH MEXICO’S
COMMUNITIES
A DISASTER CAN HAPPENWHEN THE
POTENTIAL DISASTER AGENTS OF A VOLCANIC ERUPTION INTERACT WITH MEXICO’S
COMMUNITIES
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AN ERUPTION OF POPOCATEPETL (AKA “POPO”)
WOULD IMPACT NEARBY MEXICO CITY AND PUEBLA
LOCATED 50 KM AWAY, 20 MILLION PEOIPLE ARE AT RISK
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MEXICO CITY, “POPO” AND AN AIRPLANE
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POPOCATEPETL
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LATERAL BLAST
VOLCANIC
ERUPTIONS
VOLCANIC
ERUPTIONS
PYROCLASTIC FLOWS
FLYING DEBRIS
VOLCANIC ASH
LAVA FLOWS
LAHARS
TOXIC GASES
CAUSES OF RISK
CAUSES OF RISK
CASE HISTORIESCASE HISTORIES
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LIKELY IMPACTS BASED ON “POPO’s ERUPTION HISTORY
• The pyroclastic mud flows can firm up like concrete once they stop, ruining farmland and, because they are difficult to remove, disrupting life in communities.
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LIKELY IMPACTS
• Ash can be especially harmful and even deadly to people who are unable to evacuate.
• Ash can also be deadly to livestock, on which the resident’s livelihood may depend.
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LIKELY ECONOMIC IMPACTS
• Air traffic may disrupt the economy for long periods if the ash clouds intersect the routes of jet aircraft and are a threat to safety.
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LIKELY ECONOMIC IMPACTS
• A new major eruption of Popocatepetl would likely have a devastating economic impact on local residents who may be subsistence farmers and some of the poorest of the poor.
• Ash would be especially deadly to people and livestock (on which livelihoods depend), and a potential disaster for jet aircraft.
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IMAGES OF COLIMA
Colima is not one, but two different volcanoes, the oldest one called Nevado de Colima, that is located about 450 km
(270 mi) west of Mexico City
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COLIMA
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COLIMA
• The Volcán de Colima, also known as Volcán de Fuego, is part of the Colima volcanic complex consisting of Volcán de Colima and Nevado de Colima.
• The youngest of the two, it is currently one of the most active volcanoes in Mexico and North America, erupting more than 40 times since 1576
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THE ALTERNATIVE TO A VOLCANIC--ERUPTION
DISASTER ISVOLCANO DISASTER
RESILIENCE
THE ALTERNATIVE TO A VOLCANIC--ERUPTION
DISASTER ISVOLCANO DISASTER
RESILIENCE
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A DISASTER is ---
--- the set of failures that overwhelm the capability of a community to respond without external help when three continuums: 1) people, 2) community (i.e., a set of habitats, livelihoods, and social constructs), and 3) complex events (e.g., VOLCANIC ERUPTIONS,…) intersect at a point in space and time.
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Disasters are caused by single- or multiple-event natural hazards that, (for various reasons), cause
extreme levels of mortality, morbidity, homelessness,
joblessness, economic losses, or environmental impacts.
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THE REASONS ARE . . .
• When it does happen, the functions of the community’s buildings and infrastructure can be LOST for long periods.
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THE REASONS ARE . . .
• The community is UN-PREPARED for what will likely happen, not to mention the low-probability of occurrence—high-probability of adverse consequences event.
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THE REASONS ARE . . .
• The community has NO DISASTER PLANNING SCENARIO or WARNING SYSTEM in place as a strategic framework for early threat identification and coordinated local, national, regional, and international countermeasures.
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THE REASONS ARE . . .
• The community LACKS THE CAPACITY TO RESPOND in a timely and effective manner to the full spectrum of expected and unexpected emergency situations.
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THE REASONS ARE . . .
• The community is INEFFICIENT during recovery and reconstruction because it HAS NOT LEARNED from either the current experience or the cumulative prior experiences.
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MEXICO’SMEXICO’S
COMMUNITIESCOMMUNITIES
MEXICO’SMEXICO’S
COMMUNITIESCOMMUNITIESDATA BASES DATA BASES AND INFORMATIONAND INFORMATIONDATA BASES DATA BASES AND INFORMATIONAND INFORMATION
HAZARDS: GROUND SHAKING GROUND FAILURE SURFACE FAULTING TECTONIC DEFORMATION TSUNAMI RUN UP AFTERSHOCKS
•WINDSTORM HAZARDS•PEOPLE & BLDGS. •VULNERABILITY•LOCATION
VOLCANO RISK VOLCANO RISK
RISK
ACCEPTABLE RISK
UNACCEPTABLE RISK
GOAL: VOLCANO GOAL: VOLCANO DISASTER RESILIENCEDISASTER RESILIENCE
• PREPAREDNESS•PROTECTION•EARLY WARNING•EMERGENCY RESPONSE•RECOVERY and RECONSTRUCTION
POLICY OPTIONSPOLICY OPTIONS
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LESSONS LEARNED ABOUT DISASTER RESILIENCE
• School children and adults need masks to counter adverse health effects of breathing volcanic ash.
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LESSONS LEARNED ABOUT DISASTER RESILIENCE
• Volcanic ash ruins crops and vegetation and disrupts aviation.
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LESSONS LEARNED ABOUT DISASTER RESILIENCE
• Although a complex activity, timely evacuation is essential for volcano disaster resilience
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AIR AND LAND MONITORING TECHNOLOGIES ARE VITAL
.
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LESSONS LEARNED ABOUT DISASTER RESILIENCE
ALL VOLCANIC ERUPTIONS
“RESTORATION TO NORMAL” AND RECOVERY USUALLY TAKE LONGER THAN THOUGHT.