earthquake strikes christchurch, new zealand a shallow (2.5 mi), m6.3 quake located 3 mi from...
TRANSCRIPT
EARTHQUAKE STRIKES CHRISTCHURCH, NEW
ZEALAND
A SHALLOW (2.5 MI), M6.3 QUAKE LOCATED 3 MI FROM
CHRISTCHURCH (USGS) STRUCK AT NOON ON A WORK DAY
Walter Hays, Global Alliance for Disaster Reduction, University of
North Carolina, USA
LOCATION MAP: CHRISTCHURCH
Natural Phenomena that Cause Disasters
Planet Earth’s Restlessness Causes Movement of Tectonic Plates:
Earthquakes
THE INDO-AUSTRALIA AND PACIFIC SUBDUCTION ZONE
FAULT ZONES IN VICINITY OF NEW ZEALAND
SEISMICITY MAP: VICINITY OF CHRISTCHURCH
EPICENTRES: SEPT 2010 AND FEB 2011 EARTHQUAKES
THIS QUAKE: AN AFTERSHOCK OF THE 3 SEPT 2010 QUAKE
• Christchurch has been hit by hundreds of aftershocks since the M7.1 earthquake of 3 September 2010, which caused extensive damage and injuries, but no deaths.
PHILIPPINO SEISMOLOGIST: LOOKS AT SEISMOGRAMS IN MANILA
SHALLOW-DEPTH EARTHQUAKES ARE MORE DAMAGING
SOCIETAL IMPACTS EXACER-BATED BY SHALLOW DEPTH
• Strong ground shaking toppled tall buildings and churches on a busy weekday, killing at least 100 people, severing communi-cation lines, and leaving the centre of the city looking like “a war zone.”
INTENSITY MAP: CHRISTCHURCH
CHRISTCHURCH CITY CENTRE: “A WAR ZONE”
CHRISTCHURCH CITY CENTRE: “A WAR ZONE”
CHRISTCHURCH CITY CENTRE: “A WAR ZONE”
PYNE GOULD GUINESS BUILDING: COLLAPSED
COLLAPSED BUILDING; CHRISTCHURCH
DAMAGE: CHRISTCHURCH CATHOLIC CATHEDRAL
COLLAPSE: A BAPTIST CHURCH
CRUSHED CARS: CHRISTCHURCH
BARACADED BUILDING; CHRISTCHURCH
INTERIOR CONTENTS
TRAPPED IN RUBBLE
• More than 100 people, including as many as a dozen visiting Japanese students, are thought to be trapped in the rubble.
SEARCH AND RESCUE
• Despite darkness and drizzling rain, rescue crews with sniffer dogs (and eventually heavy equipment) fanned out across the city in search of survivors, some of whom were sending text and phone messages from beneath the rubble.
SEARCH AND RESCUE WORKERS
UNUSUAL PHYSICAL IMPACTS
• 40 million tons of ice were separated from Tasman Glacier located 120 mi from the epicentre, and flooding occurred in Bexley, a suburb of Christchurch.
40 MILLION TON ICE CHUNK DISLODGED FROM TASMAN GLACIER
DISLODGED ICE IN TASMAN LAKE
CHRISTCHURCH SUBURB, BEXLEY, FLOODED
POLICY POLICY ADOPTIONADOPTION
POLICY POLICY ADOPTIONADOPTION
RISK ASSESSMENT
• VULNERABILITYVULNERABILITY
• EXPOSUREEXPOSURE
• EVENTEVENT
POLICY ASSESSMENT
• COSTCOST
• BENEFITBENEFIT
•CONSEQUENCESCONSEQUENCES
TIME FOR A NEW EARTHQUAKE SCENARIO TIME FOR A NEW EARTHQUAKE SCENARIO AND A POLICY REVIEW: TOWARDS DISASTER AND A POLICY REVIEW: TOWARDS DISASTER
RISK REDUCTIONRISK REDUCTION
EARTH-EARTH-QUAKESQUAKES
EARTH-EARTH-QUAKESQUAKES EXPECTED EXPECTED
LOSSLOSS
EXPECTED EXPECTED LOSSLOSS