La fermeture du site et l’effondrement de la cheminée ne convainquent pas tout le monde…
Optimism About Korea Will Kill Us All – Foreign Policy
▻http://foreignpolicy.com/2018/04/30/optimism-about-korea-will-kill-us-all
Last week’s inter-Korean summit, and North Korean leader Kim Jong Un’s declaration that he would “close” his nuclear test site by May, were greeted widely with celebration. But contrary to the hoopla, we have now arrived at an especially dangerous moment in Washington’s relationship with Pyongyang. We are on the verge of letting our hopes get in the way of our survival.
Consider the now widespread view that North Korea’s test site is unusable or that the mountain that contains it has collapsed. This was always garbage reporting. You can download the two academic papers that are said to have originally made these claims — they say nothing of the kind. What the papers do is prove that, after North Korea’s big nuclear test in September 2017, the cavity created by the explosion collapsed in on itself. We already knew that probably happened (although it is cool to see it demonstrated through seismology).
But the collapsing of the cavity and shrinking of the mountain do not mean the tunnels leading to it collapsed, let alone that the mountain itself had done so. And, of course, there are two other nuclear test complexes underneath entirely different mountains at the site. Kim was quoted as making this point himself: “Some said we will dismantle unusable facilities, but there are two more larger tunnels [in addition to] the original one and these are very in good condition as you will get to know that when coming and seeing them.” But commentators in the West, hoping for a diplomatic breakthrough (whether for political or more idealistic reasons), still heard what they wanted to hear about the condition of North Korea’s program.
Les articles signalés sont d’une part celui pointé ci-dessus et aussi celui-ci (27/04/2018)
Collapse and Earthquake Swarm after North Korea’s 3 September 2017 Nuclear Test - Tian - - Geophysical Research Letters - Wiley Online Library
▻https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018GL077649
Abstract
North Korea’s 3 September 2017 nuclear test was followed by several small seismic events, with one eight‐and‐a‐half minutes after the test and three on and after 23 September 2017. Seismic analysis reveals that the first event is a near vertical on‐site collapse toward the nuclear test center from 440±260 m northwest of the test site, with its seismic source best represented by a single force with a dip angle of 70°‐75° and an azimuth of ~150°, and the later events are an earthquake swarm located 8.4±1.7 km north of the test site within a region of 520 m, with a focal depth of at least 2.4 km and a focal mechanism of nearly pure strike‐slip along the north‐south direction with a high dip angle of 50°‐90°. The occurrence of the on‐site collapse calls for continued monitoring of any leaks of radioactive materials from the test site.
(pdf téléchargeable : que de la technique…)