Ridgecrest has been shaken by two major earthquakes in just over 34 hours and the shaking isn't going to stop anytime soon.

In fact, significant aftershocks of 5.0 or higher are a virtual certainty, the United States Geological Service said Saturday morning, and a quake even larger than the 7.1 magnitude that hit on Friday evening can't be ruled out.

There is a three percent chance of a quake even bigger than Friday's.

Smaller but still strong quakes are going to continue to shake the region.

"The chance of an earthquake of magnitude 5 or higher is 96 [percent]," the USGS tweeted.

Up to eight magnitude 5 aftershocks can be expected, and there's a 27 percent chance of a 6.0 or greater aftershock, the USGS added.

Hundreds of smaller shakes from 3.0 or higher are predicted.

"The chance of a quake of magnitude 3 or higher is (greater than) 99 percent, and it is most likely that as few as 240 or as many as 410 such earthquakes may occur in the case that the sequence is re-invigorated by a larger aftershock," the USGS said.

"Magnitude 3 and above are large enough to be felt near [the] epicenter. [A] number of aftershocks will drop off over time, but a large aftershock can increase numbers again, temporarily," the USGS said.

The USGS also said aftershocks happened so fast after the big quake that its instruments couldn't keep up.

"Due to [the] very high rate of quakes in [the] earliest part of the sequence, we're not able to count all events. Counts represent [a] number of events that were located by our systems and is somewhat lower than [the] true number that occurred."