Well.
Japan’s MFA is apparently saying that North Korea may have conducted a second test, according to AP.
South Korea seems to say otherwise, though:
…a South Korean official said seismic monitors did not detect any tremors that could indicate possible second North Korea nuclear test.
Japan’s NHK TV is reporting the same thing, according to Reuters.
I checked NHK’s website and they do have a headline to that effect running across the top. Reuters also said that a South Korean official observed that no reports of tremors have surfaced.
I wrote yesterday that the South Koreans were monitoring a North Korean site for a possible second test.
Update: Apparently not, AP now reports. May have been an earthquake in Japan.