This may have nothing to do with Lake FUBAR but lately the seismic activity has been of a bigger magnitude in this space between Puerto Rico and the Dominican Republic. It is always an active spot but usually very low level tremors. Now they are quite sizable quakes. Not huge like in Oceania now but the increase is notable.
Today’s map from RSOE:
CLICK ON IMAGE FOR FULL SIZE
The twin quake magnitudes are often nearly the same spot at a different depth.