Near-Zero Chance of May 11 Earthquake in Rome, USGS Says

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“To predict an earthquake, you need a precursory signal of some kind, and we’ve yet to find anything reliable,” said Tom Parsons, a geophysicist with the U.S. Geological Survey (USGS). “A lot of things have been tried in terms of looking for electrical signals or gas release, and paying attention to animal behavior, but none of these have turned out to be reliable.”

Even if seismologists were able to identify a precursory signal indicating that an earthquake was on its way, “that would happen a few days before,” Parsons told Life’s Little Mysteries, a sister site to LiveScience — not more than three decades in advance. “Earthquakes and tectonic plates interact with each other in a very chaotic system, so in order to do a long-term prediction you’d have to be able to foresee all the activity over the coming 30 years. It’s extremely unlikely that anyone would be able to do that.”

Furthermore, if you’re trying to predict an earthquake ahead of time, it would be wise to choose a location above a major fault line, not Rome. “Earthquakes are certainly not common in Rome. Most activity in Italy occurs in the Apennines,” Parsons said, referring to the mountain range that runs down the center of Italy’s “boot” and into its toe. “You feel earthquakes in Rome sometimes, but they happen elsewhere; there aren’t major fault lines underneath the city. So in terms of predicting a massive earthquake there, it’s already a kind of unlikely place.”

According to a rumor that has circulated on the Internet for months, Raffaele Bendandi, an Italian pseudoscientist who died in 1979, predicted before his death that a massive earthquake will strike Rome on Wednesday (May 11). No one is sure that he actually made such a prediction — his chief biographer is unaware of such a prediction — but regardless, in response, Romans are taking heed and fleeing their city by the thousands.

Working in this rumor’s favor is the fact that Bendandi, who also dabbled in astronomy, correctly guessed the approximate date of an earthquake in the Adriatic region in 1923, a feat for which he was later knighted. Will his alleged posthumous prediction come to pass too?

Geophysicists say no — almost certainly not. Not only are earthquakes far too chaotic to be predicted decades ahead of time, they aren’t even predictable on the scales of days.

  ”To predict an earthquake, you need a precursory signal of some kind, and we’ve yet to find anything reliable,” said Tom Parsons, a geophysicist with the U.S. Geological Survey (USGS). “A lot of things have been tried in terms of looking for electrical signals or gas release, and paying attention to animal behavior, but none of these have turned out to be reliable.”

Even if seismologists were able to identify a precursory signal indicating that an earthquake was on its way, “that would happen a few days before,” Parsons told Life’s Little Mysteries, a sister site to LiveScience — not more than three decades in advance. “Earthquakes and tectonic plates interact with each other in a very chaotic system, so in order to do a long-term prediction you’d have to be able to foresee all the activity over the coming 30 years. It’s extremely unlikely that anyone would be able to do that.”

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