We now have the whole fault outlined, with this recent M4.7 earthquake. It's 'normal' which means extension. These earthquakes are deeper and felt less. With all the earthquakes confined to this old rift, they can continue injecting all the frack waste they want to.
This is different from the Oklahoma earthquakes where there was a clear compression mechanism. These rift earthquakes are out of the high compression zone of eastern North America, and more into the 'basin and range' geological province of Nevada and such.
In reality, as they move this rift system, the ends will go into large strike-slip earthquakes. We all wait.
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