Again, 10km depth quake near Beijing. 10km depth quake is the signature of the cleaning up operation on Reptilian Secret Underground Base. The deepest of their base is 6 miles (=10km).
The epicenter on Google Map. You can see there are so many huge quarries with trailing ponds. Quarries and mines are the main entrances and construction sites of Reptilian Secret Underground Base. They can remove huge quantity of dirt from underground construction efficiently as quarries and mines.