the night of Oct. 9, North Korea conducted an underground nuclear test, the first in its history . Thus becomes the ninth country in the world to have the atomic bomb.
North Korea has since claimed to have undergone the test, clearly due to the image (must show that they are strong), but if he had kept secret the explosion, we would have known?
The answer is yes.
underground nuclear explosions in fact, release an enormous amount of energy. About the point of explosion will generate strong pressure and temperatures in the millions of degrees, while the shock wave causes crushing rocks in a band more or less concentrated. They thus avoid the terrible explosions as earthquakes,
of elastic waves recorded by seismographs around the world.
But in the world takes place every day dozens of earthquakes as the natural ones can be distinguished from those caused by nuclear explosions?
There are differences, and these differences back to the type of cause: for example in nuclear explosions since there is no slip faults, the P waves (ie the type of seismic waves of compression-expansion) always have a first stage characterized by movement compression and propagate from the point of explosion out radially in all directions.
So any seismograph around the blast zone notes that the first arriving P wave is compression. When earthquakes occur rather natural, the first fluctuations of P wave detected by seismographs around the epicenter can be either compression or expansion, depending on where the seismograph is: remember the fact that natural earthquakes are generated by sudden breakage within the lithosphere, in which there is
relative movement of rock masses along a fracture plane. So the P waves do not propagate out radially around the breaking point. (see figure below):
a.slittamento two rock masses
b.esplosione
E 'controlling all these factors since 1963 and during the Cold War, the U.S. and USSR have kept an eye on each other: the two superpowers of that time in fact, had decided to carried out since 1963 mainly underground nuclear tests, to avoid contaminating the world with their ongoing experiments on the surface. To find out when and how the enemy was doing a test, were monitored daily earthquakes detected by seismographs, and stands in the way just described the natural ones caused by those tests.
Returning to North Korea is also the bomb detonated a few weeks ago has been detected by seismographs. If go to the website of the USGS (United States Geological Survey) is the agency that American scientific control of the territory, you can see the details of the earthquake caused by the bomb. http://neic.usgs.gov/neis/bulletin/neic_tqab_m.html
On the website of the Institute of Geology and Volcanology Italian instead, on page http://www.ingv.it/ ~ roma / framesx / projects / CTBTO / Controlloesplosioni.html # Anchor -Fundamentals-6638 , you will find information on Italian participation in the Project Control Total Ban Treaty of nuclear explosions, run by the UN. Using the same methods explained above is controlled so that the nine nations have nuclear weapons to respect the treaty. Korea has just violated.
A NOTE: There are
27 000 atomic bombs in the world. The only
countries that own them are the U.S., Russia, China, France, Britain, Israel, India and Pakistan.
Now comes even North Korea, bringing to nine the number of "bombers".
nations that have the most are the U.S. (there are thousands), and Russia, while our neighbor, France, has about 350.
us?
Well, Italy luckily did not have the atomic bomb.
Or rather, did not have the Italian state, because in reality of nuclear warheads in our territory there are and how!
know that in Italy there are over one hundred U.S. military bases? Well, between the Aviano base in the province Pordenone and to Ghedi Torre in the province of Brescia, some 90 nuclear bombs are stored. American.
-Lorenzo Pasqualini-
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