Title: ShakeAlert: The Path to West Coast Earthquake Early Warning ... how a few seconds can save lives and property
Can you predict earthquakes?
No. Neither the USGS nor any other scientists have ever predicted a major earthquake. We do not know how, and we do not expect to know how any time in the foreseeable future. USGS scientists can only calculate the probability that a significant earthquake will occur (shown on our hazard mapping) in a specific area within a certain number of years.
An earthquake prediction must define 3 elements: 1) the date and time, 2) the location, and 3) the magnitude.
Yes, some people say they can predict earthquakes, but here are the reasons why their statements are false:
- They are not based on scientific evidence, and earthquakes are part of a scientific process. For example, earthquakes have nothing to do with clouds, bodily aches and pains, or slugs.
- They do not define all three of the elements required for a prediction.
- Their predictions are so general that there will always be an earthquake that fits; such as, (a) There will be a M4 earthquake somewhere in the U.S. in the next 30 days. (b) There will be a M2 earthquake on the west coast of the U.S. today.
If an earthquake happens to occur that remotely fits their prediction, they claim success even though one or more of their predicted elements is wildly different from what actually occurred, so it is therefore a failed prediction.
Predictions (by non-scientists) usually start swirling around social media when something happens that is thought to be a precursor to an earthquake in the near future. The so-called precursor is often a swarm of small earthquakes, increasing amounts of radon in local water, unusual behavior of animals, increasing size of magnitudes in moderate size events, or a moderate-magnitude event rare enough to suggest that it might be a foreshock.
Unfortunately, most such precursors frequently occur without being followed by an earthquake, so a real prediction is not possible. Instead, if there is a scientific basis, a forecast might be made in probabilistic terms. See: What is the difference between earthquake early warning, earthquake forecasts, earthquake probabilities, and earthquake prediction?
An earthquake forecast was made in China several decades ago based on small earthquakes and unusual animal activity. Many people chose to sleep outside of their homes and thus were spared when the main earthquake indeed occurred and caused widespread destruction. However, this type of seismic activity is rarely followed by a large earthquake and, unfortunately, most earthquakes have no precursory events whatsoever. The next large earthquake in China had no precursors and thousands of people died.
The USGS focuses its efforts on the long-term mitigation of earthquake hazards and by helping to improve the safety of structures, rather than by trying to accomplish short-term predictions.
Learn more:
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Can animals predict earthquakes?
The earliest reference we have to unusual animal behavior prior to a significant earthquake is from Greece in 373 BC. Rats, weasels, snakes, and centipedes reportedly left their homes and headed for safety several days before a destructive earthquake. Anecdotal evidence abounds of animals, fish, birds, reptiles, and insects exhibiting strange behavior anywhere from weeks to seconds before an...
Why are we having so many earthquakes? Has naturally occurring earthquake activity been increasing? Does this mean a big one is going to hit? OR We haven't had any earthquakes in a long time; does this mean that the pressure is building up for a big one?
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Can "MegaQuakes" really happen? Like a magnitude 10 or larger?
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Can some people sense that an earthquake is about to happen (earthquake sensitives)?
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Can the ground open up during an earthquake?
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![PubTalk 1/2018 — ShakeAlert: Path to West Coast EQ Early Warning](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/video/youtube-C6uPiZuJiCU.jpg?itok=GC2e7Pm1)
Title: ShakeAlert: The Path to West Coast Earthquake Early Warning ... how a few seconds can save lives and property
Fairweather fault lidar
![PubTalk 5/2015 — Breaking Badly:Forecasting California Earthquakes](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/video/may15thumb.jpg?itok=jot4TfRH)
by Morgan Page, USGS Research Geophysicist
by Morgan Page, USGS Research Geophysicist
--updating earthquake prediction--fact vs. fiction
by Susan Hough, USGS Seismologist
--updating earthquake prediction--fact vs. fiction
by Susan Hough, USGS Seismologist
The recent, devastating earthquake in China has sparked discussion about whether earthquakes can be predicted. USGS scientist Mike Blanpied sets the record straight on what science is capable of.
The recent, devastating earthquake in China has sparked discussion about whether earthquakes can be predicted. USGS scientist Mike Blanpied sets the record straight on what science is capable of.
Earthquake forewarning in the Cascadia region
On a report that the 2012 M 6.0 earthquake in Italy was predicted after seeing an unusual cloud formation
U.S. Geological Survey role in earthquake prediction
Earthquake prediction research at the Seismological Laboratory, California Institute of Technology
Predicting earthquakes along the major plate tectonic boundaries in the Pacific
Related Content
Can animals predict earthquakes?
The earliest reference we have to unusual animal behavior prior to a significant earthquake is from Greece in 373 BC. Rats, weasels, snakes, and centipedes reportedly left their homes and headed for safety several days before a destructive earthquake. Anecdotal evidence abounds of animals, fish, birds, reptiles, and insects exhibiting strange behavior anywhere from weeks to seconds before an...
Why are we having so many earthquakes? Has naturally occurring earthquake activity been increasing? Does this mean a big one is going to hit? OR We haven't had any earthquakes in a long time; does this mean that the pressure is building up for a big one?
A temporary increase or decrease in seismicity is part of the normal fluctuation of earthquake rates. Neither an increase nor decrease worldwide is a positive indication that a large earthquake is imminent. The ComCat earthquake catalog contains an increasing number of earthquakes in recent years--not because there are more earthquakes, but because there are more seismic instruments and they are...
What is the difference between earthquake early warning, earthquake forecasts, earthquake probabilities, and earthquake prediction?
The USGS uses these four terms to refer to four different things . Early warning is a notification that is issued after an earthquake starts. Probabilities and forecasts are comparable to climate probabilities and weather forecasts, while predictions are more like statements of when, where, and how large, which is not yet possible for earthquakes. Here are more detailed descriptions of each...
Can "MegaQuakes" really happen? Like a magnitude 10 or larger?
No, earthquakes of magnitude 10 or larger cannot happen. The magnitude of an earthquake is related to the length of the fault on which it occurs. That is, the longer the fault, the larger the earthquake. A fault is a break in the rocks that make up the Earth's crust, along which rocks on either side have moved past each other. No fault long enough to generate a magnitude 10 earthquake is known to...
Can some people sense that an earthquake is about to happen (earthquake sensitives)?
There is no scientific explanation for the symptoms some people claim to have preceding an earthquake, and more often than not there is no earthquake following the symptoms.
Can the ground open up during an earthquake?
Shallow crevasses can form during earthquake-induced landslides, lateral spreads, or from other types of ground failures, but faults do not open up during an earthquake. An earthquake occurs when two blocks of the earth’s crust slide past one another after having been stuck together in one place for a long time, because of friction on the fault, while the rest of the crust away from the edges has...
![PubTalk 1/2018 — ShakeAlert: Path to West Coast EQ Early Warning](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/video/youtube-C6uPiZuJiCU.jpg?itok=GC2e7Pm1)
Title: ShakeAlert: The Path to West Coast Earthquake Early Warning ... how a few seconds can save lives and property
Title: ShakeAlert: The Path to West Coast Earthquake Early Warning ... how a few seconds can save lives and property
Fairweather fault lidar
![PubTalk 5/2015 — Breaking Badly:Forecasting California Earthquakes](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/video/may15thumb.jpg?itok=jot4TfRH)
by Morgan Page, USGS Research Geophysicist
by Morgan Page, USGS Research Geophysicist
--updating earthquake prediction--fact vs. fiction
by Susan Hough, USGS Seismologist
--updating earthquake prediction--fact vs. fiction
by Susan Hough, USGS Seismologist
The recent, devastating earthquake in China has sparked discussion about whether earthquakes can be predicted. USGS scientist Mike Blanpied sets the record straight on what science is capable of.
The recent, devastating earthquake in China has sparked discussion about whether earthquakes can be predicted. USGS scientist Mike Blanpied sets the record straight on what science is capable of.