22/2/11 Earthquake M 6.3 - Christchurch

[CHCH Weather Chaser]

spoken like a true hardened cantabrian!

Got to have faith in these aftershocks now after so many that we will be ok! A 4.1 before in the same location to the 5.3 felt it, much smaller here but rolled for good 5-7 seconds.

[03Stormchaser]

I only got up to get my laptop, hate not knowing what rating it was given! Only a couple things fell over, photo frames etc

[Dale]

It was enough to wake me up.. mumbled to self must have been a 5ish, went to the loo and back to bed.
Spoke to numerous people in town just before, about 80% of them felt it to some degree.

[Storm Struck]

It fair shook here we have glass sliding doors they were fair moving could hear them, i heard something come crashing down in the kitchen which was one of porcelean plates with writings on it you put on your wall.
I knew it wasnt from the port hills straight away, thought it was either greendale or the porters fault which went off a week or so back.
The difference is the greendale you get the rumble/roar then it builds into the shaking, the port hills fault you get the rumble sometimes then its just straight into and quiet strong.
What i dont understand is the aftershocks were meant to be releasing themselves further E-SE hence why the port hills fault went off, so i dont understand why the activity shifted back and it poses the question does it put more pressure back on the port hills fault?.
I stayed up for about 2 hours after this mornings quake, the adrenaline just keeps you wide awake and i guess just waiting for further aftershocks.

[Manukau heads obs]

What i dont understand is the aftershocks were meant to be releasing themselves further E-SE hence why the port hills fault went off, so i dont understand why the activity shifted back

its more of an aftershock related to the first one in sep last year I would think, since it was closer to Darfield
instead of an aftershook of the Feb quake
thoughts?

[CHCH Weather Chaser]

Yeah its certainly related to the Sept 4 as part of the aftershock sequence. 0-2 Mag 5's are forecasted so we have had the two for the period.

[NZ Thunderstorm Soc]

To the regurlary asked ChCh/Canterbury question:

YES

The strongest shake experienced here since the 6.3 Feb 22nd that ChCh had, and possibly some of the 5Magnatude or so shakes experienced after September 4th.

JohnGaul
NZThS

[Storm Struck]

Yeah i guess its just more the fact the rolleston area at the southern end of the greendale hadnt released any significant aftershocks for quite some time, mainly due to the fact the port hills pulled all the energy since the 6.3 and continued aftershocks since to that area.
There was a 4.0 just before lunch in Rolleston yesterday so i am wondering if it was just enough to disrupt the fault there as it was only 1km across from the 5.3 .

[bmo]

Yesterday (12th May) was the first day in 8 months without a aftershock!
Hope that everyday can be like that for you Cantab's.

[Razor]

Yesterday (12th May) was the first day in 8 months without a aftershock!
Hope that everyday can be like that for you Cantab's.

Happende to be my birthday, I put a word in upstairs
Back to a few little wobbles today, felt about 5 or 6 here, still a quiet day touch wood

[Storm Struck]

Yesterday (12th May) was the first day in 8 months without a aftershock!
Hope that everyday can be like that for you Cantab's.

There has been days like this since where we have had quiet ones, but yeah generally a good 30 hours until a 3.4 struck in Aranui/Bexley area after midnight last night felt it here.
Oh and Happy Birthday for yesterday Razor

[NZ Thunderstorm Soc]

Just had a wee short rumble and shudder at the same time, just before 8pm.
The drums seem to be slow today.
Up now. 3.4M at 5kms, just around the corner from here.

JohnGaul
NZThS

[Manukau heads obs]

you guys spoke too soon
two 4s and a 4.6 overnight I see

[03Stormchaser]

you guys spoke too soon
two 4s and a 4.6 overnight I see

and I didnt feel one!

talking to alot of people, need a 5.0+ to wake us up now

[NZ Thunderstorm Soc]

Same here, not since that local wee one just before 8pmlast night.

JohnGaul
NZThS

[CHCH Weather Chaser]

Unfortunately the big fire blaze in Addington overnight has destroyed the quake crowe site. Real loss for Canterbury viewers as this personally is far more reliable and accessible than Geonet. Geonet does not record all earthquakes where as quake crowe had every single little quake on there (All 5500 plus). For now it seems we are going to be wondering if we feel things or not and for many of them wont find out what they actually were as Geonet wont display them all. Fustrating. Quake Crowe may come back but they dont know when or if it will. For now R.I.P quake crowe!

[Storm Struck]

Yes very devastating for Chris, people are flooding in to offer thier help either way they can on News Talk ZB.
I agree Geo Net hasnt been that great latly in not recording every quake,i am not just talking about the smal 2's but some decent 3.0-3.5 quakes as well.
Yesterdays jolt was actually a 4.2 quake not 4.4, the data anaylised on their website suggests its smaller and they have reviewd the quake but havnt changed it on the listing.
I had to laugh the other week when they put thier own man made quakes up with the detonating they are doing in the lower north island.
Heres a link to use in the meantime Leighton.
http://www.christchurchquakemap.co.nz/today

[03Stormchaser]

Really good video here that was showen on CTV on friday night:
http://youtu.be/bMicfwMmWSI

Seeing the CTV site always brings back a few memories from the 22nd

[CHCH Weather Chaser]

Sponsorship is going alllow Quake Crowe to be born again tomorrow! YAY!

[Orion]

Yay indeed! That site was brilliant.

[Storm Struck]

Nice to see the quake live up and running again, thanks to many people who made it happen within 24 hours.

Abit of a cluster tonight within 2-3 hours i see, about 4 jolts on the drum within 10 minutes didnt feel any here although the 3.7 i would have if i was home.
3.7 before 3pm at prebbleton
3.2 before 5pm in Burwood, and looks like another 3.2 followed by about four 2 pointers.
Making up for quiet week perhaps.

[Richard]

quake.crowe.co.nz
22-May at 11:18am at 0.00 depth, mag 2.5, Energy 92 kg.

Would that depth be a typo or a surface fracture?

[Brendon]

quake.crowe.co.nz
22-May at 11:18am at 0.00 depth, mag 2.5, Energy 92 kg.

Would that depth be a typo or a surface fracture?

That was offshore, so if it's correct there's potential for a tsunami from that fault line...

[Storm Struck]

It wont be a correct depth id say its about 2-3km deep, unless its like say spade depth .

Had another wee jolt tonight more a creak and shudder here and a long low rumble, people ive heard from in North New Brighton and Burwood thought it was quite big like over 5 in magnitude.
I guess the potential fault near the North New Brighton/ Waimari Beach area must have a strong crustal movement, because i remember a number of quakes that have come from there and i thought they were alot bigger than what they were.
But then again we are alot closer to the epicentre i guess.

Reference Number: 3517169
NZST: Sun, May 22 2011 7:06 pm
Magnitude: 3.5
Depth: 10 km
Details: 10 km east of Christchurch

Quake live puts it offshore north new brighton.

[Storm Struck]

Forwarded through to me via a friend on Facebook, this is from a meeting last Wednesday with Gerry Brownlee and CERA etc.
About half way down it talks about what canterbury could expect to see in the future, whether this will be released to the public i dont know or if they do how will they word it.
I think weve known this anyway in the back of our minds even since the february quake.
Infact ill copy the pieace i am referring to then you can read the rest of the article via the link.

On that scale issue, I have now heard repeated comments that Art Agnos who was mayor of San Francisco during their terrible quake was astonished at the enormity of ours. Theirs was confined to a relatively small area. Ours is huge.

That will make us the centre of attention for study for seismic activity for a long time. It’s now thought that we are looking at a longer term seismic series. (The latest guess is apparently that we have a 23% chance within the next year of a shake between 6 and 7 on the Richter scale, and dropping to 10% over the next 2 years. There is a chance of over 90% that we will have another shake between 5 and 6 in the next twelve months, dropping to over 70% in that two year horizon. Nobody was able to answer questions about Mercalli scale or g-force or depth so you can take those figures for what they’re worth. What we are seemingly certain of is that you shouldn’t put your blu-tac away just yet.)

Sue Wells - Christchurch City Councillor (and media personality)

http://suewellsnz.wordpress.com/2011/05 ... eqnz-chch/