NPR:

If the North Koreans launched even a limited artillery strike against the South, South Korean troops would fire back instantly.

If North Korea were then to escalate, Presidents Obama in Washington and Park Geun-hye in the Republic of Korea would decide how to respond.

That’s the escalation scenario, and it leads to all-out war.

I just really really hope NK doesn’t take pot-shots at Japan. The quakes never scared me, but the fuckin’ Kim-Jungs being so close and so well armed, YIKES.

UPDATE: 

NYT:

TOKYO — The Japanese Army set up a battery of interceptor missiles on the grounds of the Defense Ministry in central Tokyo on Tuesday, as the nation girded itself for a possible missile test by North Korea.