let's talk to duyeon kim, a nuclear security expert in south korea thank you for coming on.ard, is there no scope for more pressure still to be put on north korea over this? sure, and that is the plan, and even the south korean president has called for tougher sanctions and much stronger measures against the north. there are lots of sanctions that can still be implemented, secondary sanctions, sanctions against crude oil and the south korean president has even said that matter he has implicitly said let's bypass china, go through the un security council route for a resolution to cut off crude oil. there is still a lot that can be done. president moon has also ordered his military and his government to beef up its display of its military power to show off to the north that combines with the us it can neutralise north korea's nuclear weapons and missiles. and so we can expect to see washington again deploying and sending over more of its strategic assets to the korean peninsular. doesn't recent history suggests that the tougher the international community gets, the internation

duyeon kim, thank you forjoining us.wing here on bbc news other reports of tremors or earthquakes coming from around north korea, being reported by the south korean military, by the united states geological survey, and also by the chinese authorities. they va ry by the chinese authorities. they vary in the magnitudes but they are definitely picking up on some kind of tremors and the south korean military are definitely saying that they believe that those tremors are man—made and outcomes a few hours after north korea announced that it had developed a hydrogen bomb and we saw pictures of the north korean leader kim jong—un looking at those hydrogen bonds, what the north korean news agencies say a hydrogen bonds, capable of being fitted onto intercontinental ballistic missile. that was a few hours ago and then, in the last 30 minutes or so, we started getting these reports, thick and fast, from these —— from the chinese and united states geological surveys and also from south korea, of tremors being detected from around th

military service in the north korean army for 10 years but also escaped and now lives in south korea duyeon kiman—american pastor and trump surrogate. and geoffrey clifton—brown mp. this is something much more powerful. can you hear me? yes, i can hear you. tell us why this test of north korea is more worrying and potentially dangerous? yes, of course, this is really dangerous for south korea and the united states, but i think, what i feel is that it's not a surprise. excuse me, can you hear me? we can hear you loud and clear. yes, you were telling us it wasn't a surprise for you. tell us it wasn't a surprise for you. tell us why. because the regime is always talking about a military option and nuclear tests. they don't have much money, this is a regime who think about, this is really an option to protect the north korean regime. let me bring in a nuclear security expert talking to us from seoul. how do you assess this latest test? thank you for having me on the show. i would agree with ken that this is not surprising. we have been expecting the north to conduct it's sixth nuclear test. we shou