Geologists said Friday that a minor earthquake hit Yellowstone National Park last week.
The earthquake was centered 15.5 miles south-southeast of Old Faithful. It happened at 10:26 p.m. Wednesday and did not cause any damage, according to the Wyoming State Geological Survey.
The survey said the U.S. Bureau of Reclamation recorded the quake as a magnitude 3.1, while University of Utah seismographs reported it as a 3.8. The survey said it is not unusual for different networks to have different readings.
Park spokeswoman Terry Pearson said tourists were not shaken by the minor quake.
“Nobody felt anything. Nobody heard anything. Nothing,” she said.