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December 24, 2011
Relentless quakes in Christchurch
Christchurch, New Zealand, has suffered its fourth day (and 5th, 6th, and 7th big quakes) in barely over a year of what continues to be a brutal onslaught of seismicity. It began in September, 2010, with a magnitude 7.0 earthquake outside of town that caused billions of dollars in economic losses. The vigorous aftershock sequence of that quake was punctuated in February by a magnitude 6.3 earthquake east of the …
June 14, 2011
A fresh temblor in the Canterbury sequence
Christchurch, New Zealand has been plagued by earthquakes for the past year, ever since a M7.1 ripped along a previously unrecognized fault in the Canterbury Plains last September. This quake produced a vigorous aftershock sequence, including most notably a large triggered quake (with its own vigorous aftershocks) directly beneath Christchurch. The city has been reeling from that M6.1 quake for four months, beleaguered by aftershocks and duly warned (as of a week …