The quake hit at 03:36 (01:36 GMT), 76 km (47 miles) southeast of the city, at the very shallow depth of 10km (six miles), the USGS said,
In Rome, some buildings shook for 20 seconds, according to La Repubblica newspaper.
So far, there are no reports of damage or casualties.
The prime minister's office said the government was in touch with regional heads of the civil protection agency.
The quake was initially reported as being magnitude 6.4.
A 6.2, followed by a 5.5 about an hour later.
Sounds pretty bad.
Prayers for those in the area.
Live Updates:
http://www.telegraph.co.uk/news/2016/08/24/italy-quake-64-magnitude-tremor-rocks-perugia/
It looks very bad.
This earthquake was predicted 2 days ago by dutchsinse on his You Tube channel. He knows what he is talking about but gets trashed by the Scientific Establishment. Check out his videos. https://www.youtube.com/channel/UCHE92x768p8h-fMrqhsnE1Q