No Tsunami. We are on a high groundwater table where we live. When the ground shakes during an earthquake the soil particles are rearranged and the soil mass compacts and decreases in volume. This decrease in volume causes water to be ejected to the ground surface.
The earthquake provides enough vibration to compress the soil, which in the case of the Christchurch the sandstone and the sandy soil under the building. This than would rearrange the sand particle which is quiet cohesion-less and decrease the void ration and at the same time increase the pore water pressure. This than results in the removal of the excess water pressure as those results in the water coming out of the ground.
WOW. Thanks for this. I spent all week the week after the quake going to houses around my avonside area with friends shovelling sand but its not till now that i understand how it all got there.
Hello, I would like to request your permission to use a short portion of your video entitled "Liquefaction Aftermath - Christchurch Earthquake 4 September 2010". I would like to include it in an internal only (non public) training video that will be hosted on TH-cam for three weeks in an unlisted internal video.
Wow cool to see a video of it - it was so thick at our place that in some spots we couldn't walk in it (was about shin deep) took 4 hours just to shovel part of the driveway (same size as yours) just so we could get the car out
@twistedvirtue As the video correctly says this the "aftermath" of liquefaction - one result of which is to move water to the surface. The soil loses strength precisely because the upper levels become saturated at the same time as being shaken. The loose wet soil effectively "settles through the liquid" because of the shaking. This can cause buildings to sink into the soil. Whilst dry soil can also lose strength and stiffness when shaken, that's not liquefaction.
I didn't realize these sandboil "springs" would continue to run for hours after a quake. I thought they just happened during, and immediately after, and then they'd dry out quickly. Obviously not, in this case.
This was in 2010, the first big Canterbury earthquake. The 2011 Canterbury earthquake caused the most damage but was actually smaller in magnitude than 2010.
![[Live สด] การออกรางวัลสลากกินแบ่งรัฐบาล งวดวันที่ 1 กรกฎาคม 2567](http://i.ytimg.com/vi/o6JPYXalcXU/mqdefault.jpg)
The birds singing makes it seem so peacefull.
No Tsunami. We are on a high groundwater table where we live.
When the ground shakes during an earthquake the soil particles are rearranged and the soil mass compacts and decreases in volume. This decrease in volume causes water to be ejected to the ground surface.
The earthquake provides enough vibration to compress the soil, which in the case of the Christchurch the sandstone and the sandy soil under the building. This than would rearrange the sand particle which is quiet cohesion-less and decrease the void ration and at the same time increase the pore water pressure. This than results in the removal of the excess water pressure as those results in the water coming out of the ground.
WOW. Thanks for this. I spent all week the week after the quake going to houses around my avonside area with friends shovelling sand but its not till now that i understand how it all got there.
This is in Bishopdale... far away from the Eastern suburbs. There was a small pocket of us that got significant liquefaction.
Hello, I would like to request your permission to use a short portion of your video entitled "Liquefaction Aftermath - Christchurch Earthquake 4 September 2010". I would like to include it in an internal only (non public) training video that will be hosted on TH-cam for three weeks in an unlisted internal video.
Sharon Wielechowski Hi there. Not a problem. More than happy for you to use.
Wow cool to see a video of it - it was so thick at our place that in some spots we couldn't walk in it (was about shin deep) took 4 hours just to shovel part of the driveway (same size as yours) just so we could get the car out
@twistedvirtue As the video correctly says this the "aftermath" of liquefaction - one result of which is to move water to the surface. The soil loses strength precisely because the upper levels become saturated at the same time as being shaken. The loose wet soil effectively "settles through the liquid" because of the shaking. This can cause buildings to sink into the soil. Whilst dry soil can also lose strength and stiffness when shaken, that's not liquefaction.
I am so glad we did not get any liquifaction where we are, it is just creepy
I didn't realize these sandboil "springs" would continue to run for hours after a quake. I thought they just happened during, and immediately after, and then they'd dry out quickly. Obviously not, in this case.
How many times has this happened in Christchurch?!? I thought it took place in 2011?
This was in 2010, the first big Canterbury earthquake. The 2011 Canterbury earthquake caused the most damage but was actually smaller in magnitude than 2010.
I believe there were three earthquakes that resulted in liquefaction
CrusaderManNZ - Thanks for the knowledge! 👍🏻
What part of town was this?
Hi I've sent a message to your inbox about this video. Thanks
Surreal.
if it weren't for the damage caused, this would be quite beautiful!
wow very interesting what happens here
must be scary!!! i wouldent like to be there.
... it's like the stuff ATE YOUR LANDSCAPE LAWN for breakfast...
Looks more like sand boils than liquefaction to me.
that's what sand boil are from
@joeyz70 lol mate so true
bet there was a well under pressure that crack open
bet that the energy from the earthquake increased the water pressure, causing liquefaction, leading to soil boiling.
no.