Nevada is not a good comparison, it is in the Basin and Range which is undergoing crustal expansion.
How about Oklahoma? Do you consider Oklahoma a good comparison for Oklahoma?
1950s great increase in number and strength of earthquakes and then the fall back down to the level before this decade?
Recent ‘Swarm’ Of Earthquakes Not Entirely Uncommon In New England
http://www.courant.com/community/plainfield/hc-why-are-plainfield-earthquakes-happening-0114-20150113-story.html
Unfortunately, there is no answer for why earthquakes happen when they happen, Ebel said. Even in major earthquake zones there is no way to determine when a quake will occur. More earthquakes have been reported in recent years in some areas with new oil and gas exploration, according to the U.S. Geological Survey. But New England’s earthquakes are naturally occurring.
Earthquakes in Connecticut, while they may seem rare, are not exactly uncommon, Ebel said.
“What we have now is what I would characterize as a swarm of small earthquakes,” he said. “We see that on occasion here in the Northeast.”
The last time a series of earthquakes struck Connecticut was in the 1980s, Ebel said, when several earthquake swarms rattled the Moodus area for weeks. In fact, the name Moodus comes from the Native American term “Morehemoodus,” or place of noises, because of the earthquake rumblings that have apparently occurred in the area for hundreds of years, according to the USGS.