Reuters reporting:

North Korea appears to have conducted another nuclear test, Japanese national broadcaster NHK said on Wednesday.

Japanese government sources had information that there was a tremor in North Korea this morning and they were checking on the possibility of a nuclear test, NHK said.

Defying warnings from its neighbors, the United States and the U.N. Security Council, North Korea announced on Monday that it had conducted its first-ever nuclear test. Pyongyang had earlier said a U.S. “threat of nuclear war and sanctions” had forced its hand.

Updates at HA. South Koreans saying they didn’t detect anything.

Here’s the Live Internet Seismic Server chart for Inchon, Korea, today:

Any seismo-geeks out there?

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We are in range; another test coming?
Unconfirmed report: N.Korea nuke test; update: seismic activity detected;
update: USGS reports 4.2 magnitude; US intel officer: “More fizz than pop”