Well it seems new talks have now
been confirmed for April 13th. The location of these talks is still
in discussion but it seems they will probably be held in Istanbul, Turkey,
between the six major powers, U.S., Britain, France, Germany, Russia, China,
and Iran.
The main
message I want to talk about during this blog is: How do we know if Iran tests
a nuclear weapon? Well this week I actually learned a little bit about this in
my earthquake class. My professor said that usually a nuclear detonation, or
any detonation for that matter, will show a p-wave that is larger than average
compared to an s-wave in a seismogram. The p-wave is usually the first wave of
an earthquake and causes minimal damage, while an s-wave is slower and causes most
of the damage that comes from an earthquake. Here is an example of a typical
earthquake seismogram:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjCovUP0RmlubmKeS0McSHkb6p8yQ0mosTcDIfnP_2zEBI_Hxr7ngmP15FfR08DufE_2psFMjNjiQom7f4Bsuq_4qoLwiIteOF-0bJ6A3ITTajBGt-PL313YaaW0erXdRK_kBdZFKtPDSs/s640/orig+seismogram.jpg)
Note that the wave initially after the red line, the p-wave,
is comparatively smaller than the larger waves, the s-waves, behind it. This
was a 4.8 earthquake in Iran only three days ago. Now let’s take a look at
another earthquake that occurred in Iran only four days ago from the same
seismometer:
Note how this time the p-waves are considerably larger
compared to the s-waves. This is a good sign that it could be a weapons test.
Although it is incredibly unlikely that Iran would let such detailed
information about this “test” be allowed on the Tehran University website, one
can never know. In the end, this test is more than likely just another small
earthquake on the plains of Iran. But it is this kind of information that
American geologists are reviewing daily so that they can be ready if Iran
really tests one of their nuclear weapons.
http://irsc.ut.ac.ir/newsview.php?eventid=59323&network=earth_ismc__