--- title: Animals May Be Able to Predict Earthquakes 3 Weeks in Advance description: By examining footage from motion-sensor cameras in Peru's Yanachaga National Park, scientists found that animal activity declined significantly canonical: https://time.com/3770676/animals-may-predict-earthquakes/ author: Charlotte Alter article:opinion: false article:content_tier: free article:published_time: 2015-04-03T16:03:12.000Z article:modified_time: 2026-02-22T05:41:30.461Z article:section: Science og:title: Animals May Be Able to Predict Earthquakes 3 Weeks in Advance og:description: New study shows dramatic changes in animal behavior before an earthquake og:url: https://time.com/3770676/animals-may-predict-earthquakes/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt32ea433c623e38be/6987869f06f2c157d9334bf7/earthquake-richter.jpg?branch=production&width=3840&quality=75&auto=webp&crop=16:9 og:image:width: 1200 og:image:height: 675 og:image:alt: Seismometer og:type: article twitter:card: summary_large_image twitter:title: Animals May Be Able to Predict Earthquakes 3 Weeks in Advance twitter:description: New study shows dramatic changes in animal behavior before an earthquake twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt32ea433c623e38be/6987869f06f2c157d9334bf7/earthquake-richter.jpg?branch=production&width=3840&quality=75&auto=webp&crop=16:9 ---  # Animals May Be Able to Predict Earthquakes 3 Weeks in Advance  by [Charlotte Alter](https://time.com/author/charlotte-alter/)  ## Charlotte Alter Senior Correspondent Apr 3, 2015 4:03 PM UTC  Seismometer SeismometerGetty Images  by [Charlotte Alter](https://time.com/author/charlotte-alter/)  ## Charlotte Alter Senior Correspondent Apr 3, 2015 4:03 PM UTC Animals may be able to sense an earthquake coming as long as three weeks before it happens, well before humans can, a new international study found. By examining footage from motion-sensor cameras in Peru’s Yanachaga National Park, scientists found that animal activity declined significantly in the month before a major 7.0 magnitude earthquake struck, according to a study published in[ _Physics and Chemistry of the Earth._ ](http://www.sciencedirect.com/science/article/pii/S1474706515000236)During the [three weeks ](http://www.cnn.com/2015/04/03/tech/mci-earthquake-animals/index.html)before the earthquake, the cameras recorded about a third as many animal sightings as usual, and in the five to seven days before the quake, the cameras recorded no animals at all. The researchers think that [animals may be more sensitive](http://www.cnn.com/2015/04/03/tech/mci-earthquake-animals/index.html) to positive ions in the air that build up when rocks in the earth’s surface are stressed leading up to an earthquake, which may cause them to flee. This is not the first time researchers have noted this phenomenon—scientists in China and Japan have been studying it for a while, noting that lab rats have a harder time sleeping ahead of an earthquake. 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