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Showing posts with label Puerto Rico Trench Hazard. Show all posts
Showing posts with label Puerto Rico Trench Hazard. Show all posts

Monday, January 13, 2014

ALERT- Puerto Rico Trench Danger-Earthquake Swarms Near Area Now

Since 1988, the Puerto Rican Seismic Society has been trying to use the Puerto Rican media to inform people about a future earthquake that could result in a catastrophic tragedy. 

Not only Puerto Rico, but Islands in the Caribbean and Shores of the United States are in danger of a catastrophic tsunami If there is a large shift in the Trench.

The Atlantic Ocean's deepest part is found on the eight kilometer trench line, with a depth of 28 232 feet. Puerto Rico is located to the south of the trench and its fault line. The Puerto Rico Trench can most easily be described as the border between the Atlantic Ocean and the Caribbean Sea. The tireless study of this trench and the establishment of the Puerto Rican Seismic Society in 1988 are all preventative measures and safety precautions to be able to foresee and warn locals of pending tsunamis and earthquakes


Knowledge of the earthquake and tsunami risks has not been widespread among the general public of the islands located near the trench. 



Surveys of the trench have shown that the tectonic plate, just north of the Puerto Rico Trench is shifting. It is moving downwards almost underneath Puerto Rico and shows signs of recent movement. These findings are supported by the cracks in the limestone layer to the south of the trench indicating the movement of the plate, and the descending of the plate is continuing. In short, the North American tectonic plate is moving underneath the Caribbean tectonic plate.



Scientists have concluded that the Puerto Rico Trench can be dangerous and the cause of future disasters.

Puerto Rico fell victim to an earthquake on 11 October 1918 that measured 7.5 on the Richter Scale. The earthquake was followed by a tsunami that came bearing down on the Puerto Rican coast with a wall of water that was estimated at approximately six feet high. This disaster claimed the lives of 116 people. Santo Domingo felt the earth shake in 1953 and in 1981 nature gently reminded Puerto Rico of the lurking danger below the ground. All these events have been attributed to the Puerto Rico Trench.


 Following the 2004 tsunami that affected more than forty countries in the Indian Ocean, many more people now fear the consequences that such an event would bring to the Caribbean.


 As of 2007, a study conducted by the United States Geological Survey (USGS) concluded the possibility of a major earthquake to be high as 33–55%.
 Published on Jan 13, 2014 Susan Duclos
Article link with all links to the sites shown in the video listed and hyperlinked - http://b4in.info/sSJc

Earthquake global incident site where it shows that over the last 9 hours 32 earthquakes at a variety of different magnitudes have swarmed the Puerto Rico region since the bigger 6.5 magnitude early on Monday. Then we move over to the National Data Buoy Center to see two flashing events meaning, according to their chart "Tsunami station in event mode (within previous 24 hours)."

Note- No tsunami warning has been issued.



Noteworthy – This comes a day after the report of 55 quakes hitting California in a 40 minute timeframe.


Puerto Rico Trench


Perspective view of the sea floor of the Atlantic Ocean and the Caribbean Sea. The Lesser Antilles are on the lower left side of the view and Florida is on the upper right. The purple sea floor at the center of the view is the Puerto Rico trench, the deepest part of the Atlantic Ocean and the Caribbean Sea.
Photo from Woods Hole Science Center.

The Puerto Rico Trench is the deepest part of the Atlantic Ocean, and the second deepest part of the Earth's oceans, with a maximum depth of more than 8 km (5 miles), at Milwaukee Deep. The trench marks the location where the North American Plate is being subducted beneath the Caribbean Plate.

The Puerto Rico Trench is an oceanic trench located on the boundary between the Caribbean Sea and the Atlantic Ocean. The trench is associated with a complex transition between the Lesser Antilles subduction zone to the south and the major transform fault zone or plate boundary, which extends west between Cuba and Hispaniola through the Cayman Trench to the coast of Central America.

Scientific studies have concluded that an earthquake occurring along this fault zone could generate a significant tsunami.[1]

Knowledge of the earthquake and tsunami risks has not been widespread among the general public of the islands located near the trench. Since 1988, the Puerto Rican Seismic Society has been trying to use the Puerto Rican media to inform people about a future earthquake that could result in a catastrophic tragedy.
Following the 2004 tsunami that affected more than forty countries in the Indian Ocean, many more people now fear the consequences that such an event would bring to the Caribbean. Local governments have begun emergency planning. In the case of Puerto Rico and the U.S. Virgin Islands, the United States government has been studying the problem for years.[2] It is increasing its seismic investigations and developing tsunami warning systems. As of 2007, a study conducted by the United States Geological Survey(USGS) concluded the possibility of a major earthquake to be high as 33–55%.

Earthquake location[2]YearMagnitudePuerto Rico Trench


1787
8.1
Anegada Trough
1867
7.5
Mona Canyon
1918
7.5
Mona Canyon
1946
7.5
Dominican Republic
1946
8.1
Dominican Republic
1953
6.9
Puerto Rico Trench
2014
6.4

Contributing Sources:





http://beforeitsnews.com/earthquakes/2014/01/32-quakes-hit-puerto-rico-region-after-the-6-5-on-monday-video-2484616.html

http://www.puertorico.com/blog/the-fear-inspiring-puerto-rico-trench



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Monday, October 15, 2012

Low Pressure Systems Head for Earthquake Swarm?

Hurricane low pressures head for areas of earthquakes?
Hurricane Rafael, to be specific in this case.
(BTW, Rafael is the name of the Archangel Raphael, angel of healing - 
which is much needed these days)

Some thoughts from darkmattersalot:  

Rafael is Coming Home

10-13-12 Update
  1. Rafael should stall over the epicenter of the >600 earthquake swarm over the past two months (my epicenter mark is just a guestimate)
  2. Expect the most intense energy at that location & time.
  3. There is a massive particle, although weakly acting? orbiting at lower and lower altitudes which could cause electronic, magnetic and gravitational disturbance.
  4. The particle can potentially cause damage to all matter in its path.
  5. The seismic activity should be at a maximum when the particle’s orbit goes underground.  The seismic activity will most likely continue for weeks, although getting deeper in the earth as the particles orbit continues underground.
  6. Should have a new underwater sinkhole for scuba diving at the center of the seismic area.
  7. What happened to Patty?  I think she came home also to the point she entered the earth.  Patty Particle probably struck the same time as Rafael Particle, thrown towards earth from the same solar storm.
  8. I have been waiting impatiently for two months
  9. I am not sure how long the storm will maintain strength after it passes, conventional weather models should apply
  10. Enough said
10-11-12 Update.
The earthquakes continue just Northeast of Puerto Rico (more than 600 tremors over the past 6-8 weeks).  I think I have been a little too anxious in my prediction of a low pressure system moving to the area of the quakes.  During the Louisiana Seismic, Sinkhole and Hurricane Isaac there was an approx. 2 months span between when the seismic activity started and when the low pressure system known as Isaac arrived.  We are approaching that time frame for Puerto Rico and I have two bogeys on the Google Earth Radar.  There is nothing in my research/theory that says that more than one particle can’t strike and orbit at the same time in a similar area.  I have actually seen many photos from China and elsewhere where multiple sinkholes have opened up before/during flooding.  I’ll continue watching but here is an updated image from google earth showing two potential low pressure systems.  They both appear to be moving the the right direction.

Specific source: Rafael Coming Home

Rafael now a hurricane

Rafael now a hurricane 

Updated: 7:56 p.m. Oct. 15, 2012

Rafael strengthened into the season's ninth hurricane early Monday evening, the National Hurricane Center reported.

http://www.sun-sentinel.com/news/weather/hurricane/forecast/




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Thursday, April 05, 2012

Puerto Rico Trench Tsunami Hazard Threat




The Puerto Rico trench hazard  could someday result in a horrific collapse, a submarine landslide, and would produce a tremendous tsunami in the region which would spread widely across that part of the Atlantic ocean.


sub-marine-landslide-puerto-rico-trench




The National Oceanic and Atmospheric Administration (NOAA) states that the Puerto Rico Trench is the deepest part of the Atlantic Ocean, with water depths exceeding 5.2 miles! The Puerto Rico Trench is also associated with the most negative gravity anomaly on earth, -380 milliGal, which indicates the presence of an active downward force.
The region is located on an active plate boundary zone between the North American plate and the northeast corner of the Caribbean plate. The North American tectonic plate is descending under Puerto Rico and the Virgin Islands, south of the trench.
The results of studies involving mapping and seismic profiling of the sea floor off Puerto Rico’s northern shore, have uncovered evidence of an enormous submarine landslide. The the suspect slide extends across roughly 35 square miles, and evidence indicates that a slide of this size would have involved approximately 620 cubic miles of material!
Assuming that the slide occurred as a single event, an underwater slide of this magnitude would have generated a tsunami of frightening proportions. The effects of such a tsunami on present day Puerto Rico would be disastrous, and considering that the region is still tectonically active, an event like this could likely occur again at some point in the future.
In addition to the sure disaster that would unfold in Puerto-Rico, the British Virgin Islands, and other regional islands, I wonder how such a tsunami would affect the state of Florida, although 1,000 miles away, it’s only barely above sea level.  Ken, Modern Survival Blog


Bathymetry of the northeast corner of the Caribbean plate
Figure 1 
Bathymetry of the northeast corner of the Caribbean plate. The main topographic features of this area include: the Lesser Antilles volcanic arc, the old inactive volcanic arc of the Greater Antilles (Virgin Islands to Hispaniola), and the Caribbean and North American oceanic plates. Note that the Puerto Rico Trench, a deep trough where the North American plate slides past and underneath the Antilles, becomes deeper and wider north of Puerto Rico. A limestone platform is tilted toward the trough in this area. Other large-scale features are the Muertos Trough, where Caribbean plate crust may slide under the Antilles, and the Virgin Islands and Anegada Trough, whose origin is unknown.Image courtesy of USGS.

earthquake-map-puerto-rico-trench
Looking at some of the historical earthquakes in the region as reported from the IRIS earthquake monitor, there is an obvious region of very high earthquake activity off the coast of Puerto Rico which itself is located along a very steep seafloor ridge or trench. Could we be looking at an eventual disaster in this region?



Location of earthquakes

Figure 2. Location of earthquakes as a function of depth and size in the northeastern Caribbean. 


Zen Gardner:
“What Puerto Rico Trench?”  Exactly.
The arrows in the map above show the direction the underlying Caribbean tectonic plates are moving, with the resultant build-up of pressure releasing into a myrid of earthquakes in the region over the years. Puerto Rico is the smaller green island in the middle, with the Dominican Republic the larger island to the left. The string of other Caribbean islands is buried under the earthquake markers that flow down the page to the lower right.
You can see the Puerto Rico Trench wraps around the entire zone.
A few little known facts came to the fore as I was researching this area after spotting the recent increase in seismic activity in the Caribbean region.
1. The Puerto Rico Trench is the biggest and deepest such trench in the entire Atlantic ocean.
2. This trench is capable of producing 8.0 earthquakes and above.
3. The risk of a major quake, underwater landslide and mega tsunami are as great as that of the Seattle area. In fact, one recent risk assessment put it at 35 to 55%!
4. The zone hasn’t ruptured in over 200 years and that has geologists seriously concerned.
In other words, something major will happen. No one knows when, but it will happen,as it has in the past there.
Add that to the fact that 35 million people live in surrounding low lying areas and you have a monumental disaster just waiting to happen.

But Why No Warning?

What struck is that in everything I’m reading, it’s admitted this risk is huge but it’s hardly known in the area. Even Wikipedia admits:
Knowledge of the earthquake and tsunami risks has not been widespread among the general public of the islands located near the trench.
Why? Would it negatively impact the local economy, much like the idiot mayor’s development worries in the movie Jaws? Are there really such people in charge?
Well, look at the Gulf oil disaster and Fukushima for starters. I don’t think the concern is anyone’s health or well being – it’s preserving the status quo while the disasters take their toll as quietly as possible.
Remember–it’s not crisis prevention, it’s crisis management.
Puerto Rico, the Virgin Islands to its east, and eastern Hispaniola to its west, are located on an active plate boundary zone between the North American plate and the northeast corner of the Caribbean plate (figure 1). The Caribbean plate is roughly rectangular, and it slides eastward at about 2 cm/yr relative to the North American plate. Motion along its northern boundary (in the plate boundary zone region) is dominantly strike-slip (a geological fault in which an adjacent surface moves horizontally), with a small component of shortening. In contrast, on its eastern boundary, the Caribbean overrides the North American plate, creating the island arc of the Lesser Antilles with its active volcanoes.

More from Ken:

How to prepare for a tsunami?


Have a plan how you would escape to higher ground, or further inland. If you’ve already thought about it and planned a route, and you recognize the onset of the tsunami, so long as you beat the crowd you will probably be OK. Know how to recognize that a tsunami is about to happen (major earthquake while on the coast – or water withdrawing rapidly away from the coast).




The regions of earth’s crustal magnetism that have negative field strength boundaries that are directly adjacent to positive field strength areas, may or may not have any real-world effects, but it is interesting to look at and to think about how it may relate with other geophysical attributes of the region.
Contributing sources:
Modern Survival Blog

Ocean Explorer Noaa 

Iris Seismic  Monitor


Massive Puerto Rico Trench Awakening?

USGS






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