Fault Line photograph

Fault Line

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Google books books.google.com
Originally published 2009
Authors Barry Eisler
GenresNovel
Fiction
Thriller
Suspense
Date of Reg.
Date of Upd.
ID2410570
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About Fault Line


Alex Treven has sacrificed everything to make partner in his high-tech law firm. But then the inventor of a technology Alex is banking on is murdered, the patent examiner who reviewed the innovation dies, and Alex himself narrowly escapes an attack in his own home. . . .

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... " Brexit became, and has remained, the key Fault Line in the independence debate, with a majority of those in favour of EU membership also in favour of independence...

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... he added: " The central Fault Line remains the rift between James and Lachlan...

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... Home to 15 million people, it sits on the North Anatolian Fault Line, and experts predict it s due its own major earthquake before 2030...

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... As Turkey s biggest city lies on a major Fault Line, people here cannot help but ask: Will they be going through the same tragedy in the future? What can they do to prevent it? As grief sets in, mass trauma and how to respond to it has become another of Turkey s big challenges...

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... It is abundantly clear how the ground has been deformed along and near the East Anatolian Fault Line...

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... The survey confirmed the only red squirrel population in the Highlands is safe and free of greys due to the efforts of staff protecting the Highland Boundary Fault Line, a geological feature stretching from Argyll to Aberdeenshire...

Mansiya VP: The ‘non-Hindu' dancer barred from a Kerala temple

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... The incident has become yet another Fault Line in an increasingly polarised country...

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... " There s this Fault Line developing...

Turkey earthquake: Fault lines mapped from space

Feb 16,2020 9:12 am

By Jonathan AmosBBC Science Correspondent

It seems almost insensitive to start to have a deep dive into the science behind Monday's earthquake events in Turkey.

More Than 20,000 people are already confirmed dead and an unknown number still lie trapped, with The Window for their rescue closing rapidly.

And yet the science will Go On . The insights gleaned from this event will save lives in The Future .

Take a look at the map on this page. It is The Most precise yet produced of how the ground lurched in response to the enormous energies that were unleashed.

The data behind it was acquired in the Early Hours of Friday by the European Union 's Sentinel-1A satellite as it traversed north to south over Turkey at an altitude of 700km (435 miles).

The Sentinel carries a radar instrument that is able to sense the ground in all weathers, day and night.

It is routinely scanning this earthquake-prone region of The World , tracing the often very subtle changes in elevation at The Earth 's surface.

Except, of course, The Changes on Monday were not subtle at all; they were dramatic. The ground bent, buckled and in places ripped apart.

Researchers use the technique of interferometry to compare " before" and " after" views. But you do not really need to be an expert to see the consequences for Turkey in the latest Sentinel map.

The red colours here describe movement towards the satellite since it last flew over the country; The Blue colours record The Movement away from the spacecraft.

It is abundantly clear how the ground has been deformed along and near The East Anatolian Fault Line .

For both the Magnitude 7. 8 quake that struck first on Monday at 01:17 GMT and the Magnitude 7. 5 event at 10:24, the motion is " left-lateral". That is to say: whichever side of the fault you are on, The Other side has moved to The Left . And by several metres in places.

The shocking thing is that the lines of rupture have gone right through settlements; in lot of places they will have gone right through buildings.

The Sentinel map will help scientists understand exactly What Happened on Monday, and this knowledge will feed into their models for how earthquakes work in the region, And Then ultimately into The Risk assessments that the Turkish authorities will use as they plan The Recovery .

There is sure to be a lot of discussion about how the two major tremors were related and what that could mean for further instability.

The Bbc is not responsible for the content of external sites.

The map was processed by the UK Centre for Observation and Modelling of Earthquakes, Volcanoes and Tectonics (COMET). Its director, Prof Tim Wright , said The Sentinel observations vividly brought home the scale of the forces involved.

" News outlets always show earthquakes as 'the epicentre', As If it is a single point source (like a bomb). Actually, all earthquakes are caused by slip on extended faults, and the bigger The Quake the bigger the fault that ruptured, " he told Bbc News .

" We can map those ruptures with satellites because the ground around them is displaced, in this case by up to 5m or 6m. The rupture of The First event was 300km or so long and The Second big event ruptured another 140km or so of a different fault. To put those distances in context, London to Paris is roughly 345km.

" Damage will be highest near the fault but of course spreads over a wide region either side of the fault, too. It's absolutely horrific. "

In the era before satellites, geologists would map earthquake faults by walking the lines of rupture. It was a laborious process that naturally also missed a lot of detail. Radar interferometry from space was developed in the 1990s, and in recent years it has become a particularly compelling tool.

In part that is down to the quality of the sensors now In Orbit , but it is also the result of more powerful computers and smarter algorithms.

It is possible today to get a data product on to The Computers of experts, ready for analysis, within hours of a satellite making an overhead pass. Comet, unfortunately, had to wait several days for Sentinel-1A to be in The Right part of the sky to get an optimal view of Turkey. But this will improve as more and more radar satellites are launched.

" By The End of the decade, we should be able to do this kind of analysis within A Day of most damaging earthquakes, And Then we would be more useful for the relief effort. As things stand, We Are of course outside the 72-hour window for search and rescue, " Prof Wright said.

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Source of news: bbc.com

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