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Thread: Shifting Earth, Landslides and Cracks

  1. Link to Post #21
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    Default Re: Shifting Earth, Landslides and Cracks

    Temporary summary: Not all cracks are created equal
    • some are tectonically induced
    • others are the result of gravity on unstable grounds, whether water saturated or water depleted
    • while some are the results of run-of-the-mill water works over natural or man made plumbing systems (Karsts,fault lines, mines, water main ruptures, etc...)

    At Foxie and others:
    This thread is not meant to be a launching pad for all sorts of discussions on the various speculations and theories as to whys and hows about them since there are already plenty of those around the forum.
    As I stated earlier, this thread is meant as a reports and references holder documenting the various phenomena listed in its title.

    If the itch to start a discussion is overwhelming, then, please, start a discussion thread about it
    Last edited by Hervé; 6th March 2018 at 18:24.
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  3. Link to Post #22
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    Default Re: Shifting Earth, Landslides and Cracks

    Giant 3 km long earth crack in Kenya blamed on 'volcanic activity'

    Sott.net
    Fri, 16 Mar 2018 06:59 UTC


    A section of the collapsed Maai Mahiu-Narok road near Karima in Kenya. © YouTube/Daily Nation (screen capture)

    Hundreds of travelers were stranded for hours on the Narok - Mai Mahiu road at Karima in Kenya on Tuesday 13th March 2018, after a section of the road collapsed. The giant earth crack responsible is estimated to be 3 kilometers long and at least 6 meters deep and was initially blamed solely on flood waters caused by torrential rains that have left at least nine people dead across the country.

    However the Kenya National Highway Authority (KENHA) Director General Engineer Peter Mundinia has rubbished such reports and stated that the road collapse was a result of volcanic activity in the area.
    "The Mai Mahiu road was damaged as a result of volcanic activity. We can say rains catalyzed the destruction. However nobody can tell why the volcanic activity happened in that manner. If the development was caused by water alone, then we would have seen the road cut, but not the extent of this fault line. As you are aware, Suswa is in the Rift Valley and volcanic activities are still taking place in Suswa. We cannot be sure that tomorrow volcanic activities will take place in Suswa, it could be somewhere else."

    Last edited by Hervé; 16th March 2018 at 16:54.
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  5. Link to Post #23
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    Default Re: Shifting Earth, Landslides and Cracks

    Well, I might as well repost (from (here)) that Iceland textbook example of a cracks factory at work:

    Aerial Pictures Show North American and European Tectonic Plates in Iceland Pulling Apart

    0 earth, Geology, Tectonic 4:11 PM


    The dramatic terrain - the join between two tectonic plates - is popular with tourists who can explore the natural wonder on land and underwater

    Tourists look like toys in these bird's eye view photos which show an impressive split landscape where two lands meet [well, come apart, really].

    The dramatic terrain - the joint between two tectonic plates - is popular with tourists who can explore the natural wonder on land and underwater. The splits in the land, which has many faults, valleys, volcanoes and hot springs, are caused by the Eurasian and North American plates in Iceland pulling apart.

    Some of the rifts are filled with clear cold water where divers can often be seen exploring the underwater crevices, which can be up to 61m (200ft) deep. The clean water is coloured by the sand, silt and other minerals at the bottom and the deeper rifts can be clearly seen from above.


    Some of the rifts are filled with clear cold water where divers can often be seen exploring the underwater crevices, which can be up to 61m (200ft) deep




    To take the colourful photos Jassen Todorov, 40, flew in a Cessna 170 plane around 600m (2,000 feet) high








    In Iceland the Mid-Atlantic Ridge passes across the Þingvellir National Park, a popular destination for tourists




    Bridge across the Álfagjá rift valley in southwest Iceland, that is part of the boundary between the Eurasian and North American continental tectonic plates.

    "La réalité est un rêve que l'on fait atterrir" San Antonio AKA F. Dard

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  7. Link to Post #24
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    Default Re: Shifting Earth, Landslides and Cracks

    Water works enhancing earth works:

    Massive sinkhole opens up on farm after record rain in Rotorua, New Zealand

    RNZ
    Tue, 01 May 2018 12:49 UTC


    Colin Tremain next to the sinkhole

    A giant sinkhole has opened up on a farm near Rotorua following Sunday's record breaking rainfall in the region.

    The sinkhole, or tomo, was about 200 metres long, 30m wide and 20m deep, farm manager Colin Tremain said.

    It runs along a fault-line at the Tumunui farm and was discovered by one of the farm's staff, who went out to get the cows first thing on Monday morning.

    It's the ninth serious tomo that has been on the farm that was at least 10m deep, Mr Tremain said.

    Mr Tremain said he would put a fence around it because it was a waste of time trying to fill it in.

    "There was one around the other side, I was watching it in the rain, huge amounts of water going in, it wasn't even filling up with water, it's just going straight out the bottom."

    The tomo would get even bigger because there was already a crack which extended 400 to 500 metres through the property, Mr Tremain said.

    The farm had 146 millimetres of rain over a 24 hour period on Sunday.

    According to NIWA, Rotorua had its wettest hour on record with 51.8mm of rain falling between 10am and 11am on Sunday, with a total of 167.8mm of rain falling between 4am on Saturday and 6pm on Sunday.
    "La réalité est un rêve que l'on fait atterrir" San Antonio AKA F. Dard

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  9. Link to Post #25
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    Default Re: Shifting Earth, Landslides and Cracks

    Huge fissures tear through homes and infrastructure after heavy rains in Uganda

    Strange Sounds
    Thu, 24 May 2018 12:00 UTC



    Over 300 homes have been destroyed and several people displaced after several big cracks developed following heavy rain in Bupoto Sub County and Namisindwa town council in Namisindwa district, Uganda on May 23, 2018. The fissures in the ground go right through people's houses, gardens and bridges have been washed away. Like Kenya, Uganda is situated in the valley of the East African Rift, which is in the process of splitting the African Plate into two new separate plates - the Nubian Plate and the Somali Plate. After giant cracks opened up in Kenya, now Uganda has its own cracks. Something big is happening in the region right now! Just to say...

    Here some more pictures of the dramatic situation... As if an earthquake had just struck the area:


    Earth cracks open up in Uganda, destroying more than 300 homes with dozens of people evacuated.

    The Great Rift Valley is a name given to the continuous geographic trench, approximately 6,000 kilometres (3,700 mi) in length, that runs from Lebanon's Beqaa Valley in Asia to Mozambique in Southeastern Africa.



    Today, the term is most often used to refer to the valley of the East African Rift, the divergent plate boundary which extends from the Afar Triple Junction southward across eastern Africa, and is in the process of splitting the African Plate into two new separate plates.

    A map of East Africa showing some of the historically active volcanoes (red triangles) and the Afar Triangle (shaded, center)-a triple junction where three plates are pulling away from one another: the Arabian Plate, and the two parts of the African Plate (the Nubian and the Somali) splitting along the East African Rift Zone (USGS). The East African rift has two branches, the Western Rift Valley and the Eastern Rift Valley.





    The Western Rift, also called the Albertine Rift, is bordered by some of the highest mountains in Africa, including the Virunga Mountains, Mitumba Mountains, and Ruwenzori Range. It contains the Rift Valley lakes, which include some of the deepest lakes in the world (up to 1,470 metres (4,820 ft) deep at Lake Tanganyika).

    Much of this area lies within the boundaries of national parks such as Virunga National Park in the Democratic Republic of Congo, Rwenzori National Park and Queen Elizabeth National Park in Uganda, and Volcanoes National Park in Rwanda. Lake Victoria is considered to be part of the rift valley system although it actually lies between the two branches. All of the African Great Lakes were formed as the result of the rift, and most lie within its rift valley.




    In Kenya, the valley is deepest to the north of Nairobi. As the lakes in the Eastern Rift have no outlet to the sea and tend to be shallow, they have a high mineral content as the evaporation of water leaves the salts behind.

    For example, Lake Magadi has high concentrations of soda (sodium carbonate) and Lake Elmenteita, Lake Bogoria, and Lake Nakuru are all strongly alkaline, while the freshwater springs supplying Lake Naivasha are essential to support its current biological variety.

    The southern section of the Rift Valley includes Lake Malawi, the third-deepest freshwater body in the world, reaching 706 metres (2,316 ft) in depth and separating the Nyassa plateau of Northern Mozambique from Malawi; it ends in the Zambezi valley.

    The African continent is splitting in two. First cracks opened up in Kenya. Now fissures spread to Uganda. Something big is going on in the African Great Rift Valley... Just to say.


    "La réalité est un rêve que l'on fait atterrir" San Antonio AKA F. Dard

    Troll-hood motto: Never, ever, however, whatsoever, to anyone, a point concede.

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    Default Re: Shifting Earth, Landslides and Cracks

    Now cracks are opening up southwest of Reykjavik, Iceland… Eruption soon?

    By Strange Sounds -
    Mar 8, 2021

    Now, cracks in the ground have been photographed southwest of Reykjavik, Iceland.


    Dozens of fissures are cracking the ground near Reykjavik. Picture by Gunnar Grimsson / warmarctic.is

    The team of Warm Arctic, an icelandic company spezializing in geothermal reservoir engineering, has pictured dozens of cracks in the ground, where an earthquake swarm is currently hitting the Reykjanes Peninsula…

    The present geological context and history
    Experts believe a volcanic eruption could take place in the Reykjanes Peninsula.

    A large volume of magma is accumulating in this area of Iceland since about a year, causing the soil to lift by several centimeters and triggering numerous seismic swarms, getting always stronger.

    Since February 24, the situation has completely degenerated. Over 22,000 earthquakes have been recorded… Volcanic tremors too, prompting officials to raise the alert level of the Krysuvik volcano from green to orange overnight.

    Yesterday, a M5.7 and 6 M4is hit the region within the same hour… InSAR reveals ongoing dike formation in Fagradalsfjall on the Reykjanes peninsula.


    Now, cracks have been found in the Thorbjorn area, a small volcanic building formed during a single eruptive event that took place around 24,000 years ago. That exact same volcano made the headlines last year because it was the center of the first crustal deformations (caused rising magma).

    These fractures were observed near the Blue Lagoon, a geothermal area and one of Iceland’s most visited tourist attractions. Its water comes from the nearby Svartsengi geothermal plant, or better said, the volcanic system located west of Krysuvik.


    Thorbjorn and Krysuvik haven’t erupted for centuries. So there’s lot of magma ready to blow and flow!

    Meanwhile some argue the volcanoes will not erupt:

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