The Earthquakes in CA cause fires also. Hashem could have used natural means in the destruction of Sodom and Gomorrah. Maybe it was a combination. Nature is also a miracle. It's a miracle that a tree grows and an orange comes out of a branch.
But you do not explain 'from heaven' in the description of the fire and brimstone.
I see you want to make the correlation, and I consider earthquakes to be a part of the natural order of things living on a fault line.
These recent quakes have had little effect on San Francisco which is the haven for the homosexuals. Napa area is not so much...