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LATEST: Christchurch is still being hit by earthquakes this afternoon, the most recent a magnitude 3.9 just after midday. Power was restored this morning for about 10,000 Christchurch homes that lost electricity in an ealrier 5.5 quake - one of 14 to hit the city today. The largest quake - 5.5 - struck 5.45am and was centred 20km north east of Lyttelton at a depth of 15km and followed just five minutes later by a 4.2 and then two 4.1s at 5.54am and 6.06am, a 3.9 at 6.49am, a 3.8 at 7.33am, a 4.1 at 9.01am, a 3.7 at 10.04am and another 3.7 at 10.18am. The most recent, the magnitude 3.9, was 15 km deep and centred 20 km east of the city.
Originally posted by Chamberf=6
How long after the initial event are subsequent quakes considered aftershocks, and not separate events?
Just wondering.
Originally posted by diamondsmith
Still that feeling...I don't know, something..out there..it's coming,,,very strange,veeery strange!!!
We've had 9285 recorded aftershocks since the 7.1 in Sept 2010
Originally posted by MoorfNZ
Originally posted by Chamberf=6
How long after the initial event are subsequent quakes considered aftershocks, and not separate events?
Just wondering.
Until the level of quake activity returns to pre-mainshock levels it could take years and years.
The 5.5 this morning woke us up and we're west of Chch rural... the aftershock swarms are slowly moving east. However, many of us have commented that last night's quakes felt more like the quakes from the original mainshock fault (Greendale mag 7.1) than the recent city quakes.
We've had 9285 recorded aftershocks since the 7.1 in Sept 2010 which I was 10km fromedit on 1-1-2012 by MoorfNZ because: (no reason given)