probably a small atomic bomb or else an abject hydrogen failure with these puny results.
Bill Ide 易順泰 Verified account @Bill_Ide
China Earthquake Administration also confirming North Korea quake (test), magnitude 4.9 & depth of 0km
1?6?9?30?????????4.9???
dear leader's news coming at 11pm eastern I hear. china might be getting tired of their little neighbour.
http://www.cbc.ca/news/world/north-korea-quake-nuclear-1.3391121
Phineas Fahrquar @irishspy
USGS data on #NoKo quake: 41.326°N 129.010°E depth=10.0 km (6.2 mi), M5.1.

China Earthquake Administration also confirming North Korea quake (test), magnitude 4.9 & depth of 0km

1?6?9?30?????????4.9???
dear leader's news coming at 11pm eastern I hear. china might be getting tired of their little neighbour.
http://www.cbc.ca/news/world/north-korea-quake-nuclear-1.3391121

USGS data on #NoKo quake: 41.326°N 129.010°E depth=10.0 km (6.2 mi), M5.1.