Animals have not been shown to predict earthquakes reliably before they begin. Some may detect the first, weaker seismic waves seconds before people feel stronger shaking—but by then the earthquake is already underway. Reports of sharks dashing or elephants huddling during recent earthquakes describe reactions to shaking, not proven foreknowledge.
How can an animal seem to sense an earthquake before people do?
Earthquakes send out different kinds of seismic waves. The first to arrive are P-waves, which generally produce less noticeable motion. They are followed by S-waves and surface waves, which usually cause stronger shaking. An animal that detects the first vibrations may react before a nearby person recognizes the earthquake.
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That can create an apparent warning of a few seconds, but it is not a forecast: the rupture has already begun. The U.S. Geological Survey (USGS) says animals with keen senses may feel the P-wave before the stronger S-wave arrives. This is distinct from predicting an earthquake before it starts.
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A timed example: dolphins
A 2015 National Aquarium account described dolphins whose high-energy behavior coincided with P-wave arrival. Hydrophones recorded the P-wave almost 22 seconds before the S and surface waves. Researchers thought the dolphins likely felt vibrations from the P-wave rather than heard it. That single report illustrates possible seconds-ahead detection; it does not show that dolphins forecast earthquakes.
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Can animals predict an earthquake hours or days ahead?
Reliable advance prediction by animals has not been demonstrated. The USGS says reports of unusual behavior range from weeks to seconds before earthquakes, but consistent, reliable behavior and a confirmed mechanism remain elusive. It also notes that a reproducible connection between a particular behavior and an earthquake has not been established.
A USGS project published in 1981 gathered reports of both unusual and normal animal behavior through post-earthquake interviews. It found unusual behavior a few hours to a few days before some, but not most, earthquakes without known foreshocks. Even when an individual animal reacts, most animals may behave normally—making a dependable signal difficult to distinguish from coincidence.
Why are reports of strange animal behavior hard to use as warnings?
Animals can change their behavior for many reasons. If observers record only unusual behavior before an earthquake and not how often the same behavior happens on ordinary days, there is no reliable way to tell whether it was a precursor or coincidence. A useful warning signal would need to recur consistently before earthquakes and produce few false alarms.
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- Baseline matters: Researchers need records of ordinary behavior as well as unusual episodes.
- Repeatability matters: A dramatic event is not enough to establish a pattern across animals and earthquakes.
- Alternative causes matter: A behavior must be linked to an earthquake rather than other possible triggers.
The USGS traces an ancient report of unusual animal behavior before an earthquake in Greece in 373 BC. It is a historical anecdote, not a controlled observation that can establish predictive ability.
What do the shark and elephant reports actually show?
Sharks and fish in Tacoma
An October 2026 IFLScience report said Point Defiance Zoo & Aquarium footage showed fish and sharks dashing as a magnitude 4.2 earthquake rumbled through Tacoma. The account describes movement during the earthquake; it does not establish that the animals acted before it began or identify what they sensed.
Elephants at San Diego Zoo Safari Park
An Associated Press account in 2025 described elephants forming a defensive circle around calves while a magnitude 5.2 earthquake shook the area. That is a reported protective response during shaking, not evidence that the elephants foresaw the quake.
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Could elephants detect a precursor?
A 2017 peer-reviewed paper proposed a testable framework for investigating whether animals might detect sounds generated by crustal movements, using elephants as an example because of documented sound-related behavior. It offers a possible research direction, not proof that elephants can predict earthquakes. A proposed mechanism is not the same as a verified warning signal.
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What would prove that animal behavior is a reliable warning?
Researchers would need to define a specific behavior, record it systematically before and during many earthquakes, and compare it with normal behavior when no earthquake follows. The signal would also have to recur early enough to be useful and distinguish earthquakes from the many other events that can make animals act unusually. The sources cited here do not establish a population-level success rate or a validated animal-based warning method.
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For now, animal behavior should not be treated as an earthquake alert. A reaction to a P-wave may precede stronger shaking by seconds, but it is detection of an earthquake already in progress—not dependable advance prediction.
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Sources
- USGS: Can animals predict earthquakes?
- USGS: 1981 animal behavior project report
- USGS CoreFacts audio transcript
- 2017 peer-reviewed paper on a proposed animal-sensing framework
- National Aquarium: dolphins and earthquakes
- IFLScience: shark and fish footage report
- Associated Press: San Diego elephants during the 2025 earthquake
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