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Information message on underground nuclear explosion conducted in North Korea on May 25, 2009

     GS RAS has registered underground nuclear explosion conducted in North Korea on May 25, 2009. Registration time of this explosion was 00:54 a.m. GMT (04:54 a.m. Moscow time) with magnitude 5.0.
     Preliminary processing has been done with data from 34 stations, accurate processing - with data 51 stations.
     Fig. 1 presents fragments of three component record of this explosion obtained from digital station Vladivistok (∆ 2.8º).

Figure 1
 
     IPC GS RAS also has obtained information with parameters of this event from some seismological centers, these data are given in table 1:
Table 1
NN Time in origin h-min-s (GMT) Lat degr. Lon degr. Depth km N s/st Ms/ N mb/ N I0 calc GAP Center
1 00-54-40.9 41.29 129.07  51   5/31 95 IPC GS RAS (Accurate)
2 00-54-42.4 41.3 129.11  10  34   5.1/18 95 IPC GS RAS (Preliminary)
3 00-54-44.6 41.29 128.98  10  86   4.9  46 CSEM
4 00-54-44.9 41.28 129  10  51   4.7/51 71 NEIC (Preliminary)
5 00-54-43.8 41.33 129.01  76   4.7/57 68 NEIC (Accurate)
  • IPC GS RAS - Informational Processing Center, Geophysical Survey, Russian Academy of Sciences
  • CSEM - European - Mediterranean seismological center
  • NEIC - National Earthquakes Information Center of US Geological Service
  • Epicenter
         Fig.2 depicts with yellow star epicenter of this explosion, which was located in North-East part of North Korea, at 80 km S-W from Ch'ongjin, at 270 km N-E from Wonsan, at 315 km S-W from Vladivostok, at 375 km N-E from Pyongyang.

    Figure 2
    Historical records
         GS RAS registered explosion on October 9, 2006 in the same region of North Korea with magnitude =4.0


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