Vídeo Incrível: Enxurrada de Lama Destrói Mariana a Barragem Rompeu! 05/11/2015

Δημοσιεύτηκε στις 6 Νοε 2015

Barragens se rompem e enxurrada de lama destrói distrito de Mariana
Acidente foi em Bento Rodrigues e bombeiros confirmam uma morte.
Localidade está sendo esvaziada; MP vai investigar causa do acidente.
05/11/2015 17h14 - Atualizado em 06/11/2015 01h25
Barragens se rompem e enxurrada de lama destrói distrito de Mariana
Acidente foi em Bento Rodrigues e bombeiros confirmam uma morte.
Localidade está sendo esvaziada; MP vai investigar causa do acidente.
Do G1 MG
FACEBOOK
O rompimento de duas barragens de rejeitos da mineradora Samarco causou uma enxurrada de lama que inundou várias casas no distrito de Bento Rodrigues, em Mariana, na Região Central de Minas Gerais, na tarde desta quinta-feira (5).
O Corpo de Bombeiros de Ouro Preto, que tem equipes no local, confirmou uma morte e 15 desaparecidos até o momento. A vítima seria um homem que teve um mal súbito quando houve o rompimento. A identidade dele ainda não foi divulgada.
O diretor do Sindicato dos Trabalhadores na Indústria de Extração de Ferro e Metais Básicos de Mariana (Metabase), Valério Vieira dos Santos, afirma que entre 15 e 16 pessoas teriam morrido e 45 estão desaparecidas, mas ainda não há números oficiais de vítimas.
Um dos sobreviventes da tragédia, Andrew Oliveira, que trabalha como sinaleiro na empresa Integral, uma terceirizada da Samarco, disse que, na hora do almoço, houve “um abalo”, mas os empregados continuaram trabalhando normalmente.
"Começou a praticamente ter um terremoto", disse sobre o momento que as barragens se romperam.
Feridos
Quatro feridos foram levados para o Hospital de Pronto-Socorro João XXIII, em Belo Horizonte, referência em atendimento de urgência. De acordo com a Fhemig, três delas foram levadas de helicóptero e uma de ambulância.
Dentre os feridos está uma criança de 3 anos. Não se sabe se estes feridos estavam internados no hospital de Mariana e foram transferidos. Nesta unidade, quatro feridos tinham sido atendidos.
Mais de 200 pessoas da Guarda Municipal, dos bombeiros, das polícias Civil e Militar, da Defesa Civil e da mineradora trabalham nas buscas.
O secretário de Defesa Social de Mariana, Brás Azevedo, disse que a situação no local é muito grave e há riscos de mais desmoronamentos. A orientação para os moradores que deixam Bento Rodigues é que sigam para o distrito de Camargos, que é mais alto e mais seguro.
Empresa
O diretor-presidente da Samarco, Ricardo Vescovi, em comunicado divulgado no perfil da empresa no Facebook por volta das 23h desta quinta, afirmou que o rompimento ocorreu em duas barragens – e não em uma, como informava nota divulgada pela mineradora no fim da tarde.
Segundo Vescovi, romperam-se as barragens de Fundão e Santarém, na unidade industrial de Germano, localizada entre os municípios de Mariana e Ouro Preto – a cerca de 100 km de Belo Horizonte.
O diretor-presidente da empresa diz que o rompimento foi identificado na tarde desta quinta e, imediatamente, foi acionado o plano de ação emergencial de barragens para priorizar o atendimento das pessoas que trabalham no local ou que vivem próximo às barragens.

Turkey: Erdogan greets UK's Cameron as G20 summit kicks off

HIGHLIGHTS IN PARIS--police shoot-out with terrorists emerge (VIDEO)

Blood-chilling 1st moments of Bataclan attack, police shoot-out with terrorists emerge (VIDEO)

French special forces evacuate people, including an injured man holding his head, as people gather near the Bataclan concert hall following fatal shootings in Paris, France, November 13, 2015. © Christian Hartmann / Reuters

Terrifying footage of the first moments of the Bataclan concert hall attack and the shoot-out between the police and the terrorists has appeared online.

The first video shows the band, Eagles of Death Metal, performing onstage. Suddenly, loud gunshots are heard and the crowd’s cheers stop.

The band members see what is happening and flee the stage in panic.

The firefight is also depicted in another video: loud gunshots can be heard, with the security forces taking cover behind a wall of a nearby building.

Gunfire sends police officers scattering, but they soon return to their positions to face the attackers.

The death toll in the multiple attacks across Paris on Friday evening is currently 129.

The majority of casualties occurred during the attack and hostage-taking at the Bataclan concert hall.

SKY NEWS LIVE VIDEO PARIS--Μπαράζ τρομοκρατικών επιθέσεων με νεκρούς και τραυματίες στο Παρίσι

Σε κατάσταση εκτάκτου ανάγκης έθεσε τη χώρα ο Γάλλος Πρόεδρος Φρανσουά Ολάντ, ενώ έκλεισε και τα σύνορα της Γαλλίας έπειτα από τις πολλαπλές επιθέσεις που σημειώθηκαν το βράδυ της Παρασκευής στο Παρίσι όπου τουλάχιστον 60 άνθρωποι έχασαν τη ζωή τους και δεκάδες ακόμη τραυματίσθηκαν. Ο αριθμός των θυμάτων αναμένεται να αυξηθεί, καθώς ένοπλοι κρατούν ομήρους σε χώρο συναυλιών, όπου εκτιμάται πως έχει γίνει σφαγή.

Σοκ στη Γαλλία

Ειδικότερα ο Ολάντ έκανε λόγο για «τρομοκρατικές επιθέσεις χωρίς προηγούμενο» στη Γαλλία το βράδυ της Παρασκευής, ανακοινώνοντας σειρά έκτακτων μέτρων ασφαλείας.

Ο Γάλλος πρόεδρος δήλωσε ότι «κηρύσσεται κατάσταση έκτακτης ανάγκης σε όλη την επικράτεια» της χώρας και πρόσθεσε ότι ζήτησε «ενισχύσεις από τις ένοπλες δυνάμεις» για να αποτραπούν νέες επιθέσεις, ενώ ξεκαθάρισε πως έδωσε εντολή «να κλείσουν τα σύνορα».

Η κυκλοφορία στο Παρίσι απαγορεύθηκε και στρατός έχει βγει στους δρόμους, ενώ αυτόπτες μάρτυρες άκουσαν τους δράστες να φωνάζουν Αλάχ Ακμπάρ (ο Θεός είναι μεγάλος) ένδειξη ότι πίσω από την επίθεση πρέπει να βρίσκονται οι τζιχαντιστές. Αναλυτές πιστεύουν πως το χτύπημα μπορεί να συνδέεται με την είδηση του θανάτου, από αμερικανικό βομβαρδισμό του «Τζιχάντι Τζον», του δήμιου του Ισλαμικού Κράτους στη Συρία.

Οι αρχές καλούν τους πολίτες να μη βγαίνουν από το σπίτι τους, ενώ πληροφορίες κάνουν λόγο για νέο τρομοκρατικό χτύπημα, μιάμιση ώρα μετά τις αρχικές επιθέσεις, στο εμπορικό κέντρο Les Halles.

(VIDEO)--END GOOD ALL GOOD FOR asteroids approaching Earth--ΤΕΛΟΣ ΚΑΛΟ ΟΛΑ ΚΑΛΑ ΓΙΑ ΤΟΝ ΑΣΤΕΡΟΕΙΔΗ ΠΟΥ ΠΛΗΣΙΑΖΕ ΤΗΝ ΓΗ

ΤΕΛΟΣ ΚΑΛΟ ΟΛΑ ΚΑΛΑ ΓΙΑ ΤΟΝ ΑΣΤΕΡΟΕΙΔΗ ΠΟΥ ΜΠΗΚΕ ΣΤΗΝ ΑΤΜΟΣΦΑΙΡΑ ΤΗΣ ΓΗΣ Ο ΟΠΟΙΟΣ ΔΥΑΛΥΘΗΚΕ ΑΡΚΕΤΑ ΨΗΛΑ ΣΤΗΝ ΑΤΜΟΣΦΑΙΡΑ

ΝΕΩΤΕΡΑ ΣΕ ΛΙΓΟ!

Piece of space history burns up over Indian Ocean

Object in Earth-Moon orbit re-enters atmosphere as astronomers look on.

13 November 2015

Article tools

A well-traveled chunk of space debris plunged to Earth off Sri Lanka early in the morning of 13 November, but cloudy weather kept researchers on the ground from collecting data.

B. Bolin, R. Jedicke, M. Micheli

The object that fell over Sri Lanka on 13 November was spotted in early October.

Scientists tried to track the piece of debris, designated WT1190F, from both an aeroplane and from the ground as it made its dive to Earth at 06:18 UK time. The object was expected to disintegrate over the Indian Ocean just off the south coast of Sri Lanka.

A team that journeyed from France to monitor the re-entry from the Sri Lankan town of Ambalangoda was foiled by clouds and rain, said team member Auriane Egal of the Paris Observatory. Sri Lankan observers at several other locations were also clouded out. But the researchers on the aeroplane may still have gotten a view from their vantage point above the clouds.

Ahead of the impact, researchers from the United States, Germany and the United Arab Emirates transformed a chartered executive jet into an observing platform outfitted with 20 cameras. The jet was slated to monitor the re-entry at an altitude of 12,000 metres from a distance of 100 to 200 kilometres.Estimated to measure 1-2 metres across, WT1190F had circled the Earth-Moon system since at least 2009, says independent astronomy-software developer Bill Gray, who has been working with NASA to track the debris. It most likely came off a recent lunar spacecraft, but it is not out of the question that it could have dated to the Apollo era.

Researchers hoped to gather spectroscopic data to reveal the chemical composition of the object, which could help identity it. Any images of the breakup will provide clues about its structure and mechanical properties. Such information could prove useful for analysis of asteroids that target Earth.

But the jet’s orientation had to be just right — a challenge given the possibility of bad weather. “We’re working with commercial pilots who’ve never done this before, so it will be very interesting to see how this comes together,” said NASA astronomer Peter Jenniskens before the flight.

Jenniskens and his colleagues were expected to land in Abu Dhabi sometime after 10:30 UK time

VIDEO Incredible video shows wind heaving forest floor like breathing giant

Trees 'breathe' under forest floor 1:36

A video of a forest carpet in Nova Scotia breathing like a snoozing giant is getting a lot of attention online. 

Brian Nuttall was out for a walk on a breezy Oct. 30 in Apple River, Cumberland County, when he came across an unusual sight and pulled out his cellphone. 

In the video, the forest floor heaves like it is breathing. The video has garnered more than three million views from online spectators. 

However, what's really going on is less mystical — but no less dramatic. Tree roots, spread out wide underneath the forest floor have detached from their moorings. The root systems heave under the ground when the trees are caught by wind, making them appear to "breathe." 

"As I entered a patch of trees spared from clear cutting, I noticed the ground moving," Nuttall said in a Facebook post. "I believe the larger trees are doomed to blow down but are currently spared, the smaller trees around them help hold each other up, as the wind pushes the trees into one another.

"The punishing prevailing winds have taken their toll on the side hill, the roots have loosened and the mossy ground from the once shaded forest floor are giving way, soon to be toppled over."

It's likely only a matter of time before the wind wins out and the trees fall.

http://www.cbc.ca/news/canada/nova-scotia/apple-river-trees-forest-breathe-1.3311026

Ιράν .. 15 άνθρωποι έχασαν τη ζωή τους από τις πλημμύρες (βίντεο)

youtube.com

15 σκοτώθηκαν σε πλημμύρες στο Ιράν

Σύμφωνα με το κανάλι "Press TV" ιρανική Πέμπτη 12η Νοεμβρίου δολοφονία τουλάχιστον 15 ανθρώπων, λόγω της ισχυρής πλημμύρες που προκλήθηκαν από σφοδρές βροχοπτώσεις νότιο τμήμα της χώρας.

Κανάλι σημειωθεί ότι 13 άνθρωποι από έναν αριθμό από τα θύματα ήταν κάτοικοι της ιρανικής επαρχίας του Hormozgan.

Αξιοσημείωτο είναι το γεγονός ότι οκτώ άνθρωποι σκοτώθηκαν στις πλημμύρες έπληξαν πριν από δύο εβδομάδες δυτικές επαρχίες του Ιράν, όπου καταστράφηκαν περίπου 20.000 σπίτια.

Πηγή: Tass

The San Andreas Fault system, which runs almost the entire length of California, is prone to shaking, causing about 10,000 minor earthquakes each year just in the southern California area.

Titan Takes on the Big One

The CyberShake seismic hazard map shows the magnitude, or level of shaking, for the Los Angeles region, defined by the amount of change of a surface or structure in a 2-second period, with a 2% probability of increasing within the next 50 years. The map provides engineers with vital information needed to design more seismically safe structures.
Credit: Scott Callaghan, Kevin Milner, and Thomas H. Jordan (Southern California Earthquake Center)

The San Andreas Fault system, which runs almost the entire length of California, is prone to shaking, causing about 10,000 minor earthquakes each year just in the southern California area.

However, cities that line the fault, like Los Angeles and San Francisco, have not experienced a major destructive earthquake -- of magnitude 7.5 or more -- since their intensive urbanizations in the early twentieth century. With knowledge that large earthquakes occur at about 150-year intervals on the San Andreas, seismologists are certain that the next "big one" is near.

The last massive earthquake to hit San Francisco, having a 7.8 magnitude, occurred in 1906, taking 700 lives and causing $400 million worth of damage. Since then, researchers have collected data from smaller quakes throughout California, but such data doesn't give emergency officials and structural engineers the information they need to prepare for a quake of magnitude 7.5 or bigger.

With this in mind, a team led by Thomas Jordan of the Southern California Earthquake Center (SCEC), headquartered at the University of Southern California (USC) in Los Angeles, is using the Titan supercomputer at the US Department of Energy's (DOE's) Oak Ridge National Laboratory (ORNL) to develop physics-based earthquake simulations to better understand earthquake systems, including the potential seismic hazards from known faults and the impact of strong ground motions on urban areas.

"We're trying to solve a problem, and the problem is predicting ground shaking in large earthquakes at specific sites during a particular period of time," Jordan said.

Ground shaking depends upon the type of earthquake, the way a fault ruptures, and how the waves propagate, or spread, through all 3-D structures on Earth.

Clearly, understanding what might happen in a particular area is no simple task. In fact, the prediction involves a laundry list of complex inputs that could not be calculated all together without the help of Titan, a 27-petaflop Cray XK7 machine with a hybrid CPU-GPU architecture. Titan is managed by the Oak Ridge Leadership Computing Facility (OLCF), a DOE Office of Science User Facility located at ORNL.

Running on Titan, the team uses SCEC's CyberShake -- a physics-based computational approach that integrates many features of an earthquake event -- to calculate a probabilistic seismic hazard map for California. In May, Jordan's team completed its highest resolution CyberShake map for Southern California using the OLCF's Titan.

Shaking It Up

One of the most important variables that affects earthquake damage to buildings is seismic wave frequency, or the rate at which an earthquake wave repeats each second. With greater detail and increases in the simulated frequency -- from 0.5 hertz to 1 hertz -- the latest CyberShake map is the most useful one to date and serves as an important tool for engineers who use its results to design and build critical infrastructure and buildings.

Building structures respond differently to certain frequencies. Large structures like skyscrapers, bridges, and highway overpasses are sensitive to low-frequency shaking, whereas smaller structures like homes are more likely to be damaged by high-frequency shaking, which ranges from 2 to 10 hertz and above.

High-frequency simulations are more computationally complex, however, limiting the information that engineers have for building safer structures that are sensitive to these waves. Jordan's team is attempting to bridge this gap.

"We're in the process of trying to bootstrap our way to higher frequencies," Jordan said.

Let's Get Physical

The process that Jordan's team follows begins with historical earthquakes.

"Seismology has this significant advantage of having well-recorded earthquake events that we can compare our simulations against," said Philip Maechling, team member and computer scientist at USC. "We develop the physics codes and the 3-D models, then we test them by running a simulation of a well-observed historic earthquake. We compare the simulated ground motions that we calculate against what was actually recorded. If they match, we can conclude that the simulations are behaving correctly."

The team then simulates scenario earthquakes, individual quakes that have not occurred but that are cause for concern. Because seismologists cannot get enough information from scenario earthquakes for long-term statements, they then simulate all possible earthquakes by running ensembles, a suite of simulations that differ slightly from one another.

"They're the same earthquake with the same magnitude, but the rupture characteristics -- where it started and how it propagated, for example -- will change the areas at Earth's surface that are affected by this strong ground motion," Maechling said.

As the team increased the maximum frequency in historic earthquake simulations, however, they identified a threshold right around 1 hertz, at which their simulations diverged from observations. The team determined it needed to integrate more advanced physics into its code for more realistic results.

"One of the simplifications we use in low-frequency simulations is a flat simulation region," Maechling said. "We assume that Earth is like a rectangular box. I don't know if you've been to California, but it's not flat. There are a lot of hills. This kind of simplifying assumption worked well at low frequencies, but to improve these simulations and their results, we had to add new complexities, like topography. We had to add mountains into our simulation."

Including topography -- the roughness of Earth's surface -- the team's simulations now include additional geometrical and attenuation (gradual dampening of the shaking due to loss of energy) effects -- near-fault plasticity, frequency-dependent attenuation, small-scale near-surface heterogeneities, near-surface nonlinearity, and fault roughness.

On Titan, the team introduced and tested the new physics calculations individually to isolate their effects. By the end of 2014, the team updated the physics in its code to get a complete, realistic simulation capability that is now able to perform simulations using Earth models near 4 hertz.

"The kind of analysis we're doing has been done in the past, but it was using completely empirical techniques -- looking at data and trying to map observations onto new situations," Jordan said. "What we're doing is developing a physics-based seismic hazard analysis, where we get tremendous gains by incorporating the laws of physics, to predict what will be in the future. This was impossible without high-performance computing. We are at a point now where computers can do these calculations using physics and improve our ability to do the type of analysis necessary to create a safe environment for society."

Movers and Shakers

With the new physics included in SCEC's earthquake code -- the Anelastic Wave Propagation by Olsen, Day, and Cui (AWP-ODC) -- Jordan's team was able to run its first CyberShake hazard curve on Titan for one site at 1 hertz, establishing the computational technique in preparation for a full-fledged CyberShake map.

A seismic hazard curve provides all the probabilities that an earthquake will occur at a specific site, within a given time frame, and with ground shaking exceeding a given threshold.

The team used the US Geologic Survey's (USGS's) Uniform California Earthquake Forecast -- which identifies all possible earthquake ruptures for a particular site -- for generating CyberShake hazard curves for 336 sites across southern California.

This May, the team calculated hazard curves for all 336 sites needed to complete the first 1 hertz urban seismic hazard map for Los Angeles. With double the maximum simulated frequency from last year's 0.5 hertz map, this map proves to be twice as accurate.

The map will be registered into the USGS Urban Seismic Hazard Map project, and when it passes the appropriate scientific and technical review, its results will be submitted for use in the 2020 update of the Recommended Seismic Provisions of the National Earthquake Hazards Reduction Program.

This major milestone in seismic hazard analysis was possible only with the help of Titan and its GPUs.

"Titan gives us the ability to submit jobs onto many GPU-accelerated nodes at once," Jordan said. "There's nothing comparable. Even with other GPU systems, we can't get our jobs through the GPU queue fast enough to keep our research group busy. Titan is absolutely the best choice for running our GPU jobs."

Yifeng Cui, team member and computational scientist at the San Diego Supercomputer Center, modified AWP-ODC to take advantage of Titan's hybrid architecture, thereby improving performance and speed-up. He was awarded NVIDIA's 2015 Global Impact Award for his work.

"It's fantastic computer science," Jordan said. "What Yifeng has done is get in and really use the structure of Titan in an appropriate way to speed up what are very complicated codes. We have to manipulate a lot of variables at each point within these very large grids and there's a lot of internal communication that's required to do the calculations."

Using Cui's GPU-accelerated code on Titan, the team ran simulations 6.3 times more efficiently than the CPU-only implementation, saving them 2 million core hours for the project. Completion of the project required about 9.6 million core hours on Titan.

"The computational time required to do high-frequency simulations takes many node hours," Maechling said. "It could easily take hundreds of thousands of node hours. That's a huge computational amount that well exceeds what SCEC has available at our university. These pushing-to-higher-frequency earthquake simulations require very large computers because the simulations are computationally expensive. We really wouldn't be able to do these high-frequency simulations without a computer like Titan."

With Titan, Jordan's team plans to push the maximum simulated frequency above 10 hertz to better inform engineers and emergency officials about potential seismic events, including the inevitable "big one."

"We have the potential to have a positive impact and to help reduce the risks from earthquakes," Maechling said. "We can help society better understand earthquakes and what hazards they present. We have the potential to make a broad social impact through safer environment."

Video

Click on image above to view an animation of the wave propagation during a simulated Magnitude 7.8 earthquake rupturing the San Andreas Fault from southwest to northeast. Red/blue colors reflect the intensity of shaking; green indicates areas of permanent ground deformation. The colored vertical “signals” show the evolution of seismograms at three locations.