Another sizable earthquake in Christchurch, New Zealand

Last year, the city of Christchurch in New Zealand experienced a M7.2 earthquake. Luckily that earthquake was centered in a relatively unpopulated area outside the city in the middle of the night. On Monday, however, a potential aftershock of the September 2010 earthquake struck closer to the city during midday, a potentially much more dangerous mix. The new earthquake was a M6.3 (preliminary) at ~5 km depth and initial reports of the earthquake suggest a lot of damage in the city (top left and below). There is already some impressive video that seems to have captured one of the aftershocks of this new earthquake as it happened as well. You can see the webicorder of the region here as well. GNS New Zealand does have an excellent image showing the shockwave of the earthquake as it was received across the country (see below) - the stations are listed north (top) to south (bottom), with the signal from the main earthquake and aftershocks.