<p><strong>A&nbsp;wounded woman is helped to safety following a strong <a href="http://environment.nationalgeographic.com/environment/natural-disasters/earthquake-profile.html">earthquake</a> in <a href="http://maps.nationalgeographic.com/maps/map-machine#s=r&amp;c=-43.52352886550121, 172.63818383216855&amp;z=7">Christchurch, New Zealand (see map)</a>, on February 22.</strong></p><p>The magnitude 6.3 earthquake struck Christchurch during the lunchtime rush, toppling buildings and killing at least 65, according to Tuesday-morning (ET) news reports. Many more are still trapped in the rubble.</p><p>The temblor is one of several aftershocks that have rattled southern <a href="http://travel.nationalgeographic.com/travel/countries/new-zealand-guide/">New Zealand</a> since a powerful magnitude 7.1 earthquake struck Christchurch this past fall. That quake caused no fatalities. (See <a href="http://news.nationalgeographic.com/news/2010/09/photogalleries/100903-new-zealand-earthquake-christchurch-pictures/'">pictures of the earlier earthquake in New Zealand</a>.)</p><p>"This is just heartbreaking," CNN reported New Zealand Prime Minister John Key as saying.</p><p>"This may be New Zealand's darkest day."</p>

New Zealand Earthquake Survivors

A wounded woman is helped to safety following a strong earthquake in Christchurch, New Zealand (see map), on February 22.

The magnitude 6.3 earthquake struck Christchurch during the lunchtime rush, toppling buildings and killing at least 65, according to Tuesday-morning (ET) news reports. Many more are still trapped in the rubble.

The temblor is one of several aftershocks that have rattled southern New Zealand since a powerful magnitude 7.1 earthquake struck Christchurch this past fall. That quake caused no fatalities. (See pictures of the earlier earthquake in New Zealand.)

"This is just heartbreaking," CNN reported New Zealand Prime Minister John Key as saying.

"This may be New Zealand's darkest day."

Television still from TVNZ via AP

Earthquake in New Zealand: Pictures From a "War Zone"

A powerful earthquake Tuesday collapsed buildings, and killed at least 65 in what the prime minister called the country's "darkest day."

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