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Thread: Earthquakes in the DR

  1. #41
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    Preliminary Earthquake Report
    Magnitude 3.4
    Date-Time • 29 Nov 2017 04:56:50 UTC
    • 29 Nov 2017 04:56:50 near epicenter
    • 29 Nov 2017 00:56:50 standard time in your timezone
    Location 19.302N 68.169W
    Depth 25 km
    Distances • 83.5 km (51.8 mi) NNE of Punta Cana, Dominican Republic
    • 94.9 km (58.9 mi) NE of Salvaleón de Higüey, Dominican Republic
    • 109.2 km (67.7 mi) ENE of Santa Cruz de El Seibo, Dominican Republic
    • 123.3 km (76.4 mi) E of Samaná, Dominican Republic
    • 128.7 km (79.8 mi) NE of La Romana, Dominican Republic
    Location Uncertainty Horizontal: 3.8 km; Vertical 32.5 km
    Parameters Nph = 9; Dmin = 90.8 km; Rmss = 0.38 seconds; Gp = 286°
    Version =
    Event ID pr 20173330

  2. #42
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    Preliminary Earthquake Report
    Magnitude 3.3
    Date-Time • 4 Dec 2017 03:08:18 UTC
    • 4 Dec 2017 03:08:18 near epicenter
    • 3 Dec 2017 23:08:18 standard time in your timezone
    Location 19.639N 67.736W
    Depth 40 km
    Distances • 136.6 km (84.7 mi) NNE of Punta Cana, Dominican Republic
    • 146.6 km (90.9 mi) NNW of Isabela, Puerto Rico
    • 147.4 km (91.4 mi) NNW of Aguadilla, Puerto Rico
    • 152.7 km (94.7 mi) NE of Salvaleón de Higüey, Dominican Republic
    • 164.2 km (101.8 mi) NNW of San Sebastián, Puerto Rico
    Location Uncertainty Horizontal: 2.5 km; Vertical 11.0 km
    Parameters Nph = 9; Dmin = 147.6 km; Rmss = 0.10 seconds; Gp = 344°
    Version =
    Event ID pr 20173380

  3. #43
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    Buster,
    you should take a boat trip out to the north water sometime.

    I am told that not that far out - a few miles - you can stand waist deep on top of a submerged mountain range.

    It's this range that gives the quakes , I understand.

    Stepping back to a big picture -
    that range extends thru the Gulf of Mexico to blend with the Yucatan Peninsula and then flow northward to blend with the San Andreas fault in CA.

    One large rift in the earth's crust.... a plate, they call it ??

    Study that up and let us know.....huh??

  4. #44
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    My own bit of study shows it actually connects to the south... So America

    https://en.wikipedia.org/wiki/Caribbean_Plate

    Might be fun to learn more

  5. #45
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    There is a patchwork of faults that directly impact DR. There are three subduction faults where a tectonic plate slides under another plate or a section of fault slides under another and 2 major transform faults where the opposite sides of the fault are slipping past each other horizontally (left to right) .

    The fault you refer to, named the Hispanola Fault, is out to sea in the Atlantic running more or less east to west and makes one of its closest approaches to the island near Puerto Plata. Along this fault the North American Plate is subucting under the Caribbean Plate. The NA plate is causing an undersea ridge to rise up towards the surface of the Atlantic ocean. A significant quake along this fault is more than capable of causing lots of damage from shaking and could produce a set of Tsunami waves that would affect the entire north and northeast coasts within minutes (10 - 20 minutes).

    In the middle of the island is a smaller subduction zone and patchwork of lessor transform faults.

    South of the island another large under sea subduction zone known as the Meurtos Fault. .

    Two significant inland transform faults are of prime concern. In the north, the Septentrional fault runs the length of the island from east to west and the south/central Enriquillo fault running west to east all the way through Haiti and ending east of lake Enriquillo.

    Generally speaking the risk of a significant earthquake in the DR is defined as being of medium risk from day to day with a significant earthquake due anytime within the next 40 years.

    All of the faults are capable of producing shaking that could result in massive amounts of damage to buildings and infrastructure locally and potentially island wide. The general trend over the past 70 or so years has been to see infrequent major quakes in the magnitude of 6.4 to 7.0. I believe the most recent was a 6.4 in 2003 centred inland near Puerto Plata.

    Between the big shakes are almost daily smaller tremors scattered along the various fault lines. Some noticeable and others not (magnitudes less than 3 normally with an occasional 3.? now and then). The island of Hispaniola is in a very active seismic area and it is only a matter of time until a jolt occurs that everyone will be immediately aware of.

    Based on the confluence of the potential forces from the various faults the North Coast From Haiti all the way to Punta Cana is at a higher potential risk than anywhere else, being sandwiches between two contiguous major faults. An imaginary line running east to west through Santiago being 2nd and the south coast coming in 3rd.

    However, while the risk factors for a large earthquake in a given location vary statically with respect to probability, the next big one could still occur anywhere at anytime.

  6. #46
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    Quote Originally Posted by william webster View Post
    Buster,
    you should take a boat trip out to the north water sometime.

    I am told that not that far out - a few miles - you can stand waist deep on top of a submerged mountain range.

    It's this range that gives the quakes , I understand.

    Stepping back to a big picture -
    that range extends thru the Gulf of Mexico to blend with the Yucatan Peninsula and then flow northward to blend with the San Andreas fault in CA.

    One large rift in the earth's crust.... a plate, they call it ??

    Study that up and let us know.....huh??
    The only place 'north' where you can stand would be the large Silver Bank and the smaller Navidad bank, but those are about 70 miles out. Unless you are talking about an offshore reef, there are no submerged mountains where you can stand. This would be a huge navigational hazard and would have taken many ships down already. If you have any detailed information on this, I would be interested in its exact location.

  7. #47
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    That must be it.
    I seem to remember Silver banks 

    And the 70 miles ring a bell 

  8. #48
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    Preliminary Earthquake Report
    Magnitude 3.3
    Date-Time • 5 Dec 2017 02:24:28 UTC
    • 5 Dec 2017 02:24:28 near epicenter
    • 4 Dec 2017 22:24:28 standard time in your timezone
    Location 18.224N 68.351W
    Depth 146 km
    Distances • 32.1 km (19.9 mi) ESE of Boca de Yuma, Dominican Republic
    • 40.0 km (24.8 mi) S of Punta Cana, Dominican Republic
    • 57.4 km (35.6 mi) SE of Salvaleón de Higüey, Dominican Republic
    • 69.4 km (43.1 mi) ESE of La Romana, Dominican Republic
    • 94.2 km (58.4 mi) SE of Santa Cruz de El Seibo, Dominican Republic
    Location Uncertainty Horizontal: 4.5 km; Vertical 2.4 km
    Parameters Nph = 14; Dmin = 32.4 km; Rmss = 0.39 seconds; Gp = 166°
    Version =
    Event ID pr 20173390

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