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More video is available from the New York Times: "Deadly Earthquake Shakes Central Italy."
The Guardian (UK) news site has an interactive map which shows the proximity of L'Aquila, the epicenter of the quake, to the City of Rome, as well as Naples, where Mount Vesuvius, Italy's active volcano, is located.
The tremors were powerful enough to be felt in Rome and the Telegraph (UK) and New York Times both report that the Baths of Caracalla, near the Aventine Hill, have suffered damage.