Two more small earthquakes struck eastern Connecticut Wednesday morning, continuing a swarm of earthquakes that has rattled the earth in the area at least a dozen times since Thursday.

A 1.8-magnitude temblor hit at 6:33 a.m. Wednesday, the US Geological Survey said. A 1.8-magnitude quake followed at 8:10 a.m. Both struck in the area of Plainfield, Conn.

The Globe reported Wednesday that the earthquake swarm was centered in the area of Plainfield, Killingly, and Sterling, near the Rhode Island border.