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Thread: Earthquakes in the DR

  1. #11
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    "Stirred not shaken please".

  2. #12
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    Quote Originally Posted by Cdn_Gringo View Post
    DRones are pretty good at saying, "hey did you feel that?" Granted most of these little shakes go unnoticed by all of except the most schizoid of dogs and elephants. I don't post anything less than a 3.0 for that very reason. I think it is important to be aware that our little island shakes with a frequency that is higher than most are probably aware of.
    I agree, and since it is all history albeit an hour ago no one seems too interested. But they should be interested and have an escape plan from their residence in case a big one hits.
    It is the concrete roofs and subsequent levels of floors in Condo and apartment units that cause the concerns. Concrete is a solid material with no real flexibility to back up ones mental conclusions about living in an earthquake zone .
    Every big fire starts with a small incipient one. Not much difference with earthquakes.

    Keep up the good work Cdn_Gringo. Appreciate the information.
    Russell

  3. #13
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    Default The sky will fall some day...

    There seems to have been an above average number of minor quakes north of Puerto Rico and around the Mona Passage in the past 6 - 8 weeks.

    The two schools of thought are that minor slips relieve built up stresses and forestall a larger earthquake or numerous small shakers are a prelude or indicator of a much larger energy release that is primed to occur. None-the-less, it is clear that two major faults (and to a lesser extent several minor fault lines) in the DR pose a significant risk to the population here. These will slip someday. Each day that passes gets us one day closer to "someday" whenever that may be.

    From today's DR1 News:

    Alert to be prepared for an earthquake in the DR

    The director of the Seismology Institute at the state university UASD, Eugenio Polanco Rivera, is alerting all in the Dominican Republic that on any day now a major earthquake could affect the country. He explains the tectonic faults have 71 years of storing energy that eventually will need to be released, likely causing a major earthquake. The most recent earthquake and the largest to affect the Caribbean was one of 8.6 Richter scale that occurred in 1946.

    He said it is necessary for residents to be aware of the high seismic risk of the country that is susceptible to slippage of the Caribbean plate and the North American plate and all regions of the country should take preventive actions.

    Polanco said the most serious risk for the country is in the areas along the Septentrional Fault. There, the ground in Santiago, Puerto Plata, La Vega and San Jose de Ocoa are most vulnerable to a major shake given that soft soils in these areas amplify ground shaking. He said with exceptions such as Los Prados, and others, the capital city of Santo Domingo is built on solid rock soil.

    https://www.listindiario.com/la-repu...-la-actualidad
    http://www.thornlesspath.com/faultlines/faultlines.htm

  4. #14
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    The Director of Seismology has allegedly said that the the larst major Caribbean earthquake was in 1946 .. he forgot the Port o prince earthquake of 2010 which devastated Haiti . he also predicted that an earthquake would hit the DR any day soon .he also gave some most simplistic explanations saying basically that most of the capital would be safe because it was built on rock but the areas on the fault line in the Santiago San Francisco are would be vulnerable .he seems to have not read anything about the Kobe earthquake in Japan nor the Christchurch earthquake in New Zealand .
    What worries me about this alleged statement , and I am rather inclined to think the summary of what he said may not be very accurate , is that it is very simplistic and does not address other factors .These factors relate to the actual structures themselves and whether they are sitting on a shallow slab or are sitting on very deep foundations or as is the case in Kobe whether the buildings are sitting on huge rubber anti shock supports .
    The earthquake that flattened Central Christchurch was of the same magnitude as the Haiti earthquake and recently buildings mainly survived because they were built conforming with the NZ earthquake code but old buildings such as the Anglican cathedral fell ..all on the same rock foundations .
    Of course the closer you are to the fault line ,the greater chance you have of disaster . Prior to the Haitian earthquake I had a hacienda outside la Romana and was staying there . I told everyone that the big one would hit us soon ...as it happened it hit Port o Prince and was not felt in la Romana ..no one has explained why ..we only know it burst out closer to the fault line than la Romana is .

  5. #15
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    I can tell you this as fact.......

    My house is atop a rock cliff and I felt nothing in 2010.

    My friends were on the water's edge, below me - in Cabrera.
    The water in their pool sloshed over the edges, they ran from the house fearfully.

    They called me asking if we were alright ( we were having a dinner party)........

    Alright ?- I questioned..
    Like what - out of wine ?

    Then they told their story - the rest is history.

    They were right - major quake shake

  6. #16
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    Since we're talking about 2010 quake, our whole property undulated. Was like a big water bed. Rocking chairs swayed and we all got dizzy. South coast between San Cristobal and Bani. 




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  7. #17
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    Long way from the catastrophe in Haiti - your place
    at least we are along the same coastline and the fault lies off the north coast as I understand it

    Big deal - how the Dominican report could read as it does above is confusing

  8. #18
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    Cdn Gringo ..my earlier post was deleted so I will have another shot at this. The Director said that the most recent earthquake to affect the Caribbean was in 1946 ..Surely the earthquake in 2010 that devastated Haiti was the most recent and as such the directors theory of the need to have release every 71 years falls down ..we have had the next one after 1946 already. There is a need for all of us to understand that we live in a country with seismic risk I agree with but to go on and not mention other factors that can cause damage apart from the geological differences is to ignore the lessons learned in Kobo, Japan and in Christchurch ,New Zealand in recent years .In both those places .some buildings fell and other buildings remained in tact for reasons that the construction of the buildings differed building to building . New Zealand, often called the shaky isles, has a very strong code and in Christchurch the new buildings that were built to the code remained in tact but older buildings such as the cathedral fell . In Kobe , those with very deep foundations and/or enormous rubber additions to the foundations remained in tact . I am surprised my home in Zona Colonial has stayed upright for more than 300 years as even in the basement I can see no rock outside ,just clay . I hope this posting survives as my home has .

  9. #19
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    Buster
    Get the comments from the 2010 earthquake made in the Daily News Thread moved over here

    Some reports - mine included - are there

    That shudder shook both north & south coasts..... big, to say the laest

  10. #20
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    I am not sure if I am Buster but assuming I am ...in my original deleted message here I did mention that for two weeks prior to the Haiti earthquake , I was staying in a farm I had east of La Romana and every second night or so there were tremours and I was predicting, to anyone who wished to listen, a very big quake in the Boca de Yuma area where the epicentre of these things seem to be located . on the day of the quake I was playing golf and felt absolutely nothing as it had hit Port o Prince and the line was through the north of Haiti and then Santiago ...Port o Prince did not have the small tremours that the East had earlier had. On returning to my old home in Zona Colonial there was not even a small crack ..the walls are made of rubble mainly .

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