Pictures: New Zealand earthquake

Bricks from a damaged building lie on a crushed car after a 7.1 magnitude earthquake struck on September 4, 2010 in Christchurch, New Zealand. Civil Defence have declared a state of emergency and there has been considerable damage across the city and surrounding areas.  (Photo by Joseph Johnson/Getty Images)

Building rubble is strewn across the street from damaged buildings in the city centre after a 7.1 magnitude earthquake struck at 4:35 am on September 4, 2010 in Christchurch, New Zealand. Civil Defence have declared a state of emergency and there has been considerable damage across the city and surrounding areas.  (Photo by Kurt Langer/Getty Images)

Building rubble is strewn across the street from damaged buildings in the city centre after a 7.1 magnitude earthquake struck at 4:35 am on September 4, 2010 in Christchurch, New Zealand. Civil Defence have declared a state of emergency and there has been considerable damage across the city and surrounding areas.  (Photo by Kurt Langer/Getty Images)

Building rubble is strewn across the street from damaged buildings in the city centre after a 7.1 magnitude earthquake struck at 4:35 am on September 4, 2010 in Christchurch, New Zealand. Civil Defence have declared a state of emergency and there has been considerable damage across the city and surrounding areas.  (Photo by Kurt Langer/Getty Images)

A damaged building is seen after a 7.1 magnitude earthquake struck at 4:35 am on September 4, 2010 in Christchurch, New Zealand. Civil Defence have declared a state of emergency and there has been considerable damage across the city and surrounding areas.  (Photo by Joseph Johnson/Getty Images)

A police car drives on a cracked road after a 7.1 magnitude earthquake struck at 4:35 am on September 4, 2010 in Christchurch, New Zealand. Civil Defence have declared a state of emergency and there has been considerable damage across the city and surrounding areas.  (Photo by Joseph Johnson/Getty Images)

Cars drive on a cracked road after a 7.1 magnitude earthquake struck at 4:35 am on September 4, 2010 in Christchurch, New Zealand. Civil Defence have declared a state of emergency and there has been considerable damage across the city and surrounding areas.  (Photo by Joseph Johnson/Getty Images)

Christchurch Mayor Bob Parker and New Zealand Prime Minister John Key look at a collapsed building in Manchester Street after a 7.1 magnitude earthquake struck at 4:35 am on September 4, 2010 in Christchurch, New Zealand. Civil Defence have declared a state of emergency and there has been considerable damage across the city and surrounding areas.  (Photo by Joseph Johnson/Getty Images)

A burning building is seen on Worchester Street after a 7.1 magnitude earthquake struck at 4:35 am on September 4, 2010 in Christchurch, New Zealand. Civil Defence have declared a state of emergency and there has been considerable damage across the city and surrounding areas.  (Photo by Joseph Johnson/Getty Images)

A damaged car caused by the falling debris is seen after a 7.1 magnitude earthquake struck at 4:35 am on September 4, 2010 in Christchurch, New Zealand. Civil Defence have declared a state of emergency and there has been considerable damage across the city and surrounding areas.  (Photo by Joseph Johnson/Getty Images)

A damaged building is seen after a 7.1 magnitude earthquake struck at 4:35 am on September 4, 2010 in Christchurch, New Zealand. Civil Defence have declared a state of emergency and there has been considerable damage across the city and surrounding areas.  (Photo by Joseph Johnson/Getty Images)

A collapsed building is seen after a 7.1 magnitude earthquake struck 30km at 4:35 am on September 4, 2010 in Christchurch, New Zealand. Civil Defence have declared a state of emergency and there has been considerable damage across the city and surrounding areas.  (Photo by Joseph Johnson/Getty Images)

A resident wheels a trolley of supplies up Manchester Street after a 7.1 magnitude earthquake struck at 4:35 am on September 4, 2010 in Christchurch, New Zealand. Civil Defence have declared a state of emergency and there has been considerable damage across the city and surrounding areas.  (Photo by Joseph Johnson/Getty Images)