Canterbury Earthquakes

[NZ Thunderstorm Soc]

As we are getting on from the Sept 4th 2010 event and the disastrous February 2011 event, I thought I would start up a new topic on this issue, as now we have Chris Crowe from Canterbury Quake Live with us on the forum.

JohnGaul
NZThS

[NZ Thunderstorm Soc]

2 earthquakes were felt here this morning plus one yesterday. All were very light with their bearing in the region south of Rolleston.
Interesting that since June the 1st, there has only been one in the ChCh city area.

JohnGaul
NZThS

[CHCH Weather Chaser]

2 earthquakes were felt here this morning plus one yesterday. All were very light with their bearing in the region south of Rolleston.
Interesting that since June the 1st, there has only been one in the ChCh city area.

JohnGaul
NZThS

Good point, with one well offshore east of CHCH being an odd one by itself, your right the rest are associated back with the older fault. Felt the 3.7 and 3.9's this morning.

[Storm Struck]

This is why the port hills fault went the activity was slipping SE over time, it seems in the past month there has been abit of back peddling with quakes centred back on the greendale more so the eastern end where the two faults could possibly link up.
This means the pressure must be getting put back on the faults to the SE, if smaller ones are not ocurring on them as often.

[Orion]

Felt this morning's 9.09am quake here: jolt and rattle, preceded by a "was that an earthquake?" sensation which I assume was some sort of shock-wave. Feel sorry for those upset and enduring damage.

[NZ Thunderstorm Soc]

2 good earthquakes here today for Queens's Birthday. One just after 9am and another a few minutes ago.
Both had good solid shaking with them possibly being close to the epicenter. One of my indicators flew across the room, well half the room.

JohnGaul
NZThS

[CHCH Weather Chaser]

Yes 4.5 the latest one. Lasted quite some time too but big difference between the two.

[NZ Thunderstorm Soc]

I noticed that today's earthquakes are in a line NE to SW, sort of.

JohnGaul
NZThS

[CHCH Weather Chaser]

I see Quake Crowe has just added 6 more little ones following the 5.5. One was on Governors Bay so finally one back over on that fault.

[snowstormwatcher]

Felt the 5.5 here this morning.

[Richard]

It was only about 2mins before this mornings big bugger i was doing the usual log in the Canterbury Quake live and thinking ...hmmm its got too quiet lately and i'm sure there's a few other of us thinking the same thing too.

[NZ Thunderstorm Soc]

Felt a few rumbles, this evening, but not coming up yet on the Geo.
One at 1732 and another @ 1814hrs.

JohnGaul
NZThS

[Richard]

A visit to the mouth of the Waimakarir river today has really shown just how much the land has sunk along the southern half of the Pegasus Bay coastline,the pine trees in the photo i took today had always been well back from the high tide as can be seen in the Google map link,now the waves have washed out 10-20m of the trees and are eating into the sand hills behind.
In the Google photo it looks close to high tide.
Also the boat club building now has water entering it when there's a spring tide



http://maps.google.co.nz/maps?hl=en&ie= ... 9&t=h&z=17

[Orion]

Very interesting, Richard. [Not to do with e/q, but puts me in mind of Culbin, buried in sand in Scotland: http://www.forestry.gov.uk/forestry/INFD-77FEVZ - a fascinating link to explore]
- I guess we regard the land as 'permanent' and don't like it when we see visible swift changes in our lifetime.

[NZ Thunderstorm Soc]

I see the Number 4 has something to do with the Canterbury Earthquakes so far?

4th September
22nd February
13 June



JohnGaul
NZThS

[CHCH Weather Chaser]

The aftershock this morning seemed like a 5, was only 4.4. They need to lose their freshness. One thing I have noticed is the intensity of a 4.5 fresh after an earthquake is much stronger feeling than a 4.5 months after one. The duration is different too. Interesting.

[Richard]

The duration is different too. Interesting.

That is, so how is it different?

[CHCH Weather Chaser]

Well the 4.4's we got before the June 13th 6.3 didnt last too long and didnt make the walls 'bend' where as now this mornings 4.4 for example lasted a good 10 seconds and gave the house an almighty shove.

[Storm Struck]

Ive found this too like this mornings one it felt like one of the greendale quakes, it rolled on for quite some time after.
I wonder if the new fault which i will call scarlborough fault for now, is a simular fault to the greendale.
From what we know the Port Hills Fault is on an angle and goes out towards Diamond Harbour, perhaps this one is more vertical like the greendale and lets out different seismic waves.

[CHCH Weather Chaser]

Hmm...its interesting. Just had another now that lasted for 15 seconds.

[Storm Struck]

Another 2 here, heard the first one with the rumble then just a very quick lurch of the house second was a wobble.
Didnt feel the 4.4 after 2pm though was in the shower, but latest is 4.5 and 3.9 both close together on the southern side of godley heads in the harbour.

[CHCH Weather Chaser]

Whats the haps with the flooding in the hard hit suburbs? Have the silt been cleared from the gutters yet? If we have some thick drizzle set in tomorrow could be interesting...

[Richard]

Wont matter if the gutters are cleared or not,the storm water systems are munted anyway

[CHCH Weather Chaser]

Wont matter if the gutters are cleared or not,the storm water systems are munted anyway

Yeah thats true but it could be so much worse if the silt is not on the road side or footpath as oppose to in the gutters.

[Razor]

Geez the east will be flooded if we get 5mm tomorrow. Fingers crossed our charmed run with the rainfall gods continues long enugh for a few repairs. Cold ain't so bad when its dry