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| North Korea: Tremor detected near weapons' test site | |
| (35 minutes later) | |
| A magnitude-3.4 earthquake has been detected in North Korea. | |
| The earthquake occurred about 50km from a nuclear test site, monitors say. Previous quakes have occurred during weapons' tests. | |
| Chinese seismologists said it was a "suspected explosion". But South Korea says that it could be a natural quake not caused by a nuclear test. | |
| North Korea carried out a massive nuclear test on 3 September which has been widely condemned at the UN. | |
| The size of Saturday's tremor is smaller than that usually detected when North Korea has tested weapons. | |
| After the last test, initial reports from the US Geological Survey put the tremor at magnitude 5.6 with a depth of 10km (six miles) but this was later upgraded to magnitude 6.3 at 0km. | |
| The latest quake was recorded at a depth of 0km in North Hamgyong province, home to the Punggye-ri nuclear site, South Korea's meteorological agency says. | |
| It said it believed the quake was natural because the specific soundwaves generated by artificial earthquakes were not detected, Reuters news agency reports. | |
| Analysts from the Comprehensive Nuclear Test Ban Treaty Organization are examining the "unusual seismic activity of a much smaller magnitude" in North Korea, executive secretary Lassina Zerbo tweeted. | |
| He said the quake occurred "about 50km from prior tests". | |
| Previous tests | |
| What did N Korea's nuclear tests achieve? | |
| North Korea's missile programme | |
| How advanced is Pyongyang's nuclear programme? |