North Korea continued to send more illicit coal shipments from key ports last month after initially seeing an uptick in October, satellite imagery shows, suggesting Pyongyang has enjoyed a lingering export boost from China’s recent power shortages.

An NK Pro review of satellite imagery from September to November identified nearly 100 ships docked at known coal berths in the DPRK, with a notable spike in October. North Korea is prohibited from exporting coal under U.N. sanctions. 

Peter Ward, a North Korea economy expert and contributor to NK Pro, said the findings could indicate that