Christchurch aftershocks normal seven years later

Image: Christchurch Quake Map
Image: Christchurch Quake Map

Seismic activity in Christchurch rumbles on - seven years after two destructive earthquakes shook the region.

Since the 7.1-magnitude quake in September 2010 and a 6.3-magnitude quake in February 2011, the region has experienced more than 20,000 earthquakes and aftershocks, according to the Christchurch Quake Map.

Just last week the city was rocked by four quakes, ranging from 3.1 to 4.0.

GeoNet duty seismologist Anna Kaiser said this was typical behaviour for the Canterbury region and it would take years for seismic activity to return to its low pre-2010 rate.

"This week there's been a few quakes close to the central city and we get them further out as well. They're not a cause for concern,'' Ms Kaiser said.

"Since the quakes starting in 2010, there's been an increase in aftershocks - and we expect aftershocks every now and then.''

While aftershocks would continue, the chances of a large magnitude earthquake happening in the region had dropped off since the height of the earthquake sequence, Ms Kaiser said.


Add a Comment

Our journalists are your neighbours

We are the South's eyes and ears in crucial council meetings, at court hearings, on the sidelines of sporting events and on the frontline of breaking news.

As our region faces uncharted waters in the wake of a global pandemic, Otago Daily Times continues to bring you local stories that matter.

We employ local journalists and photographers to tell your stories, as other outlets cut local coverage in favour of stories told out of Auckland, Wellington and Christchurch.

You can help us continue to bring you local news you can trust by becoming a supporter.

Become a Supporter