The "earthquake" hit at 3:29 North Korean time, September 23, 2017.
Trump tweeted at 3:28 am, Greenwich Mean Time, September 22, 2017.
3:29 pm, September 23, 2017, in North Korea would be 2:29 am in Washington DC, September 22, 2017.
And 2:29 am, September 22, 2017, in Washington DC would be 7:29 am, September 22, 2017, Greenwich Mean Time.
And 2:29 am, September 22, 2017, in Washington DC would be 7:29 am, September 22, 2017, Greenwich Mean Time.
So the "earthquake" hit at 7:29 am, Greenwich Mean Time, and 2:29 am, Washington DC time, both on September 22, 2017.
I THINK.
Now read this, from CNN: http://www.cnn.com/2017/09/23/asia/north-korea-seismic-activity/index.html
"Analysts say that seismic activity detected Saturday near the site of North Korea's Punggye-ri nuclear site..."
"May be aftershocks as a result of a nuclear test earlier this month."
I don't believe it. I think it was this:
See?
http://nypost.com/2017/09/23/china-says-earthquake-hits-north-korea/
To me, this clinches it.
http://www.abc.net.au/news/2017-09-23/quake-detected-in-north-korea-china-south-divided-on-cause/8978286
"The US Geological Survey said it could not conclusively confirm whether the quake...was manmade or natural."
"Tremor not as powerful as previous nuclear quakes."
Here's the beauty part: Trump would never confirm that action had been taken, and the Norks could never admit it.
So I'm guessing we and our allies took out...something.
Surgically.