Landslides
"The causes of landslides are not a mystery to mankind. Layers of rock and soil such that rain running along a clay or rock layer can create a slippery surface for the weight of the layers above it is a common cause. A rock jumble from previous mountain building, broken or fractured rock easily dislodged. We have stated that the earthquakes man experiences between the periodic passages of Planet X can be considered aftershocks from the last passage, and this is true of landslides also. Mountain building rumples the landscape, so the land is not flat but has steep ravines and hill sides. Older mountain ranges are recognized for their rounded or smoothed appearance, because of frequent landslides distributing the rubble.
"As we approach another passage, another Pole Shift, the pace of landslides has picked up. Why would this be? Plates under pressure will put pressure on regions that contain rumpled hillsides and deep ravines, as these give more readily than strictly flat land, thus act as a weak link. In addition, due to the wobble, the weather has gotten more extreme, with drought and deluge increasing in extremes. Dry ground, suddenly flooded with rainwater needing to seek its level as runoff, will create internal water slides between the rock and soil layers that constitute the rumpled hillsides. Is there an early warning system that mankind could use? The trembles that soil about to slide emits could be detected, yes. These are not earthquakes, and have their own frequency. "
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Comment by Starr DiGiacomo on January 31, 2017 at 6:28pm
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http://www.thebigwobble.org/2017/01/iconic-hollywood-hills-landslid...
Iconic Hollywood Hills landslide knocks power out for hundreds as house slides down hillside
Tuesday, 31 January 2017
Photo NBC Los Angeles
Five homes were evacuated and power was knocked out to hundreds of people after a hillside collapsed Monday evening in a Hollywood Hills neighborhood.
The mudslide occurred before 5:30 p.m. in the 8100 block of West Laurel View Drive.
According to the Los Angeles Fire Department, three homes were directly affected by the mudslide. The backyard of one of the homes slid down a hillside, crossed Laurel View Drive and went into the front yards of two other homes.
In the process, the mudslide damaged power lines and buried at least one vehicle, LAFD said.
There were no reported injuries.
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http://sciencythoughts.blogspot.com/2017/01/homes-abandoned-after-l...
Saturday, 28 January 2017
Homes abandoned after landslide in San Mateo County, California.
Three homes have had to be abandoned after a landslide at La Honda in San Mateo County, California this week. Home owners started to notice cracks in walls on Monday 23 January 2017, which grew during the next two days, till the road beneath the properties buckled on Wednesday 25 January. The properties have been red tagged (declared unsafe for habitation) by local authorities, leaving the homeowners unclear as to their future.
One of the properties in La Honda, California, that has been declared unsafe following a landslide this week. Aaron Kinney/Bay Area News Group.The La Honda area is notoriously prone to landslips, which have apparently been happening for the last few thousand years, despite the overall relief of the area being quite low. These typically involve blocks of topsoil moving downslope after rainfall events, rather than deeper rock-events triggered by the state's complex seismic situation.This week's incident happened after several weeks of heavy rainfall and winter storms that have affected much of California, with almost a meter of rain having fallen in the La Honda area already this month, and states of emergency being declared in 50 of the state's 58 counties. Landslides are a common problem after severe weather events, as excess pore water pressure can overcome cohesion in soil and sediments, allowing them to flow like liquids. Approximately 90% of all landslides are caused by heavy rainfall.
Road below the houses damaged by the January 2017 La Honda landslip. Josie Lepe/Bay Area News Group.California has been battered by a succession of Pacific storms this winter, bringing widespread flooding and triggering a number of landslip and subsidence events. This is due to exceptionally high temperatures over the Pacific Ocean off the coast of the state this year due to a La Niña weather system over the southern Pacific; ocean storms form due to heating of air over the sea, as the air is heated the the air pressure drops and the air rises, causing new air to rush in from outside the forming storm zone. If this zone is sufficiently large, then it will be influenced by the Coriolis Effect, which loosely speaking means the winds closer to the equator will be faster than those further away, causing the storm to rotate, clockwise in the northern hemisphere and anticlockwise in the southern hemisphere.
Whilst the high winds associated these storms is extremely dangerous, the real danger from such storms is often the flooding. Each millibar drop in air pressure can lead to a 1 cm rise in sea level, and large storms can be accompanied by storm surges several meters high. This tends to be accompanied by high levels of rainfall, caused by water picked up by the storm while still at sea, which can lead to flooding, swollen rivers and landslides; which occur when waterlogged soils on hill slopes lose their cohesion and slump downwards, over whatever happens to be in their path.
The approximate location of the January 2017 La Honda landslip. Google Maps.The La Niña weather system is the opposite of the El Niño weather system, in which unusually cold surface temperatures spread across the equatorial Pacific from the upwelling zone on the South American coast. This traps warm water from the western Pacific, preventing it from spreading east and warming the central Pacific. This leads to lower evaporation over the (cooler) east Pacific, leading to low rainfall on the west coast of South America, and higher evaporation over the (warmer) west Pacific, leading to higher rainfall over East and Southeast Asia and northern Australia.
The effects of a La Niña weather system in December-February. NOAA.This also leads to a breakdown in surface circulation in the North Pacific, which generally rotates clockwise, so that the same body of water stays off the coast of California, where it is constantly warmed by the Sun, leading to high levels of evaporation and onshore winds that bring high rainfall and flood events to the state.
The effect of the La Niña weather system on the weather of North America. NOAA.
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http://abcnews.go.com/International/wireStory/killed-10-missing-cen...
2 Killed, 10 Missing in Central China Landslide
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Comment by Howard on January 14, 2017 at 7:01pm
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1000 Evacuated, 2 Dead After Enormous Mudslides Hit Northern Argentina (Jan 10)
About 1000 people have been evacuated in the northern Argentine province of Jujuy after a mudslide killed two women and injured at least five other people.
The towns of Volcan and Tumbaya were the communities most heavily affected by the mudslide on Tuesday.
Two stretches of Highway 9, one of the main roads through the region, were washed out.
The two women were found Tuesday inside a vehicle that had overturned and on Wednesday, Red Cross authorities confirmed that five people were injured in assorted incidents in the area.
The landslide also affected the Dakar road race, which had to suspend its ninth phase and adjust its route because of poor weather conditions and the cutting of Highway 9.
A detour of some 200 km had to be implemented for the majority of the vehicles in the competition.
The evacuated people "are being transported to five ... centres, two in San Salvador de Jujuy and three in Volcan," according to Argentine Red Cross communications director Natalia Gennero.
Sources
http://www.nzherald.co.nz/world/news/article.cfm?c_id=2&objecti...
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Arctic Coastlines Collapsing Over 20 Meters Per Year (Jan 5)
Thawing permafrost in the Arctic is leading to coasts disintegrating into the sea at a rate of up to 22 meters a year in some areas.
The large quantities of ice in Arctic coastal soils help to hold the land together, and when temperatures rise the land starts to fall apart. As well as land, archaeological remains and ancient frozen animal bodies and plants are also washed into the sea.
The retreat of the coastlines is also flooding shallow Arctic waters with both nutrients and pollutants, scientists say an article in the journal Nature Climate Change. While there is already evidence of how animals such as polar bears are being affected by climate change, very little is known about what effect coastal collapse will have on Arctic marine life. The loss of land and permafrost is also having a profound effect on people's livelihoods in the Arctic.
One coast retreating fast is that of Herschel Island off the coast of Canada in the Beaufort Sea. At Herschel, thawed permafrost is collapsing in the form of mudslides, spreading out into the coastal waters in sediment plumes stretching for miles.
There is very little data available across Arctic coastlines at the moment, so scientists are using Herschel Island as a model to try to understand what might happen elsewhere. Study author Michael Fritz of the Alfred Wegener Institute's Helmholtz Centre for Polar and Marine Research in Germany says that the island, which retreats by up to 22 metres a year, is a good indicator for how the coasts of other Arctic nations could be faring. Countries that have permafrost coastlines in the Arctic include the US, Canada, Russia and Greenland.
"We have very little data at the moment. Only about 2% of the Arctic coasts are actually classified – so for those we know how high the cliff is, what is the sediment, what is the geology, what is the carbon content, what are the nutrients and pollutants in the soil," Fritz told IBTimes UK.
As 34% of coasts in the world are permafrost – around 253,000 miles – Fritz said that we can expect to see more mudslides across the Arctic region.
"We can until now only guess the implications for the food chain," he said. However, there are several ways that Fritz says it might be affected.
The soil from the melted permafrost deposits a large quantity of organic material in the water, which is broken down by microorganisms, releasing more carbon dioxide into the atmosphere. The nutrients released can also fuel the growth of algal blooms, depleting oxygen in the water and potentially killing fish and other sea animals.
Fritz and his colleagues are calling for a concerted international effort to study Arctic coastlines. There has been little research on this previously due to the inaccessibility of many of the coasts, and it can be politically challenging to study the area.
Source
http://www.ibtimes.co.uk/arctic-coastlines-turn-mudslides-they-coll...
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Comment by jorge namour on December 30, 2016 at 3:30pm
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Dozens trapped under mud after coal mine collapses in India
December 30, 2016
http://edition.cnn.com/2016/12/30/asia/mine-collapse-india/index.html
(CNN)A huge open-pit coal mine has collapsed in eastern India, trapping at least 30 people and killing at least seven, police officials say.
Hari Lal Chouhan, Superintendent of Police in Godda, where the mine is located, said seven bodies have been pulled out of the debris so far. The exact number of those feared trapped is unknown.
He added that as many as 20 vehicles have been buried in the landslide.The cause of the landslide is still being investigated.
Catastrophe struck the vast mine Thursday evening local time, but rescue teams were unable to start their operation straight away due to a lack of technology, according to police officials.
Mining operations were reportedly taking place 200 feet beneath the ground.
Mr. Chouhan confirmed that a National Disaster Response Force (NDRF) team were now traveling to the site to help dig through the mud. CONTINUE...MAP::https://en.wikipedia.org/wiki/Godda
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http://www.fijitimes.com/story.aspx?id=382585
Landslide sweeps homes to sea
LUKE RAWALAI
Sunday, December 18, 2016A google earth map of Dreketi Village on Qamea. Picture: Google Earth
Update: 1:51PM Houses were swept to sea in a massive landslide in Dreketi village on Qamea island.
Thirty two year old villager Paulo Sakaraia described the experience as a nightmare and said people had to flee for their lives at 6am.
He said the landslide occurred after heavy rain caused a massive landslide.
"It was lucky that the landslide happened at 6am this morning while there was a bit of light and people could find their way out of their homes," he said.
"More than half of the village is covered in soil and debris and it is very hard to move around the village."
"A few of the old people in the village and young children have been moved to the neighbouring settlement of Natakala as we speak."
Mr Sakaraia said that villagers with relatives on the island of Taveuni have been ferried across this morning.
He added the nursing station and the school were pushed to the sea.
District Officer Taveuni, Taveuni Kalivati Rabuka who serves Qamea and nearby northern islands had left for the island when contacted for a comment.
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Hundreds Evacuated in Central China after Massive Ground Fissures Appear (Dec 9)
More than 400 villagers have been evacuated after huge cracks and cave-ins appeared in Jingmen City, in central China’s Hubei province.
Wide cracks stretching up to hundreds of meters suddenly appeared early Saturday morning. Fish ponds dried up, buildings collapsed and roads gave way, after land subsidence extended across most parts of the village.
"We woke up hearing a huge noise, like a bomb going off. I turned on the light and found the house cracking. We took our kids and ran out barely wearing any clothes."
Local authorities immediately cordoned off the village.
Source
http://english.cctv.com/2016/12/14/VIDEEM5AxLlga86wo9r9XBKb161214.s...
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Dramatic Landslide Strikes Malaysia (Nov 26)
Evacuations orders are in place for 340 Serendah residents following a terrifying landslide event that opened a 500-meter wide crater.
It was a traumatic experience for stall owner Normah Ninggal, 48, when she heard a loud noise and witnessed several cars parked next to her food stall disappear into the ground.
Shocked, she and her children ran as fast as they could towards their house nearby while the ground continued to shake, revealing a large crater.
"My children and I just ran towards our house and we can see the trees shaking and the ground suddenly opened up and caved in.
Another resident, Amirul Hakim, 18, said he was stunned and literally froze up upon seeing the stalls and cars falling into the massive crater one after another.
"It was a shocking sight. We can even hear the soil moving..."
Mohd Fakhurrazi Yusof's wife called him at work to tell him “a tree had fallen” near their home in Taman Idaman, Serendah.
He was shocked to find a huge part of his neighbourhood had been swallowed up in a massive 500m-wide crater, and his house was just inches away.
His bedroom window had a clear view of the gaping hole that left a neighbour injured and swallowed at least 10 cars.
Sources
http://www.themalaymailonline.com/malaysia/article/residents-ordere...
http://www.thestar.com.my/news/nation/2016/11/27/fallen-tree-turns-...
http://www.nst.com.my/news/2016/11/192055/serendah-residents-recall...
http://www.nst.com.my/news/2016/11/192045/landslide-area-declared-r...
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New Zealand Quake Causes 100,000 Landslides (Nov 14)
The now-named Kaikoura Earthquake triggered up to 100,000 landslides in Northern Canterbury and southern Marlborough.
The largest of them, brought down on the south side of the Clarence River mouth in the wake of the overnight 7.5 quake, brought down an estimated one million cubic metres.
Tonight, GNS Science reported that like other quakes, this one, first registering near Culverden, appeared to have involved jumping from one fault rupture to another in a complex pattern.
This compound style of rupture was a feature of the magnitude 7.1 Darfield quake of 2010 where up to eight neighbouring faults ruptured almost simultaneously.
At daybreak today three GNS geologists took to the air in helicopters to make observations of quake damage in the North Canterbury-Marlborough region.
They described the huge Clarence River landslide as the biggest landslide in New Zealand since the Young River landslide near Wanaka in 2007.
The number and distribution of landslides is considered consistent with the severity of the ground shaking.
They also observed numerous surface fault ruptures, blocked rivers, and a section of the main north-south railway line shunted sideways by at least two metres.
Numerous landslides were blocking main highways and rail tunnels, as well as a starling seabed rise on the beach.
Sources
http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=1...
http://blogs.agu.org/landslideblog/2016/11/14/kaikoura-earthquake-1/
https://twitter.com/lou_gordongreen/status/798011354548293632
http://info.geonet.org.nz/display/quake/2016/11/18/Landslides+and+L...
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