--- title: "How many earthquakes are there each year? about 20,000 located" description: "about 20,000 located a year — around 55 a day How the figure is estimated, how confident it is, and what makes the scale graspable." url: https://atoneplace.net/how-many/earthquakes-a-year/ site: "At One Place" --- # How many earthquakes are there each year? **How many earthquakes are there each year?: about 20,000 located a year — around 55 a day** One magnitude-8 quake releases as much energy as a thousand magnitude-6 quakes, so almost all the world's seismic energy comes from the handful of events at the top of the list. The US Geological Survey's National Earthquake Information Center locates roughly 20,000 earthquakes a year, about 55 a day. That is what gets located, not what happens: several million earthquakes a year go undetected because they are too small or too far from a seismometer. The distribution is fixed by the Gutenberg-Richter law — each step down in magnitude means about ten times as many events — so there are roughly 15 magnitude-7 quakes a year, 150 magnitude-6, 1,500 magnitude-5, and one magnitude-8 or above. ## How the figure is arrived at A global network of seismometers records ground motion; the arrival-time differences between stations fix the location by trilateration and the amplitude fixes the magnitude. Detection threshold, not seismicity, sets the annual count — as the network densified through the 20th century the "number of earthquakes" rose sharply without the Earth changing at all. ## How confident it is - **Low estimate:** 12,000 - **High estimate:** 25,000 - **Spread:** 2.1× between the bounds ## Other living things and the natural world counts - [How many people are there in the world?](https://atoneplace.net/how-many/people-alive-right-now/) — about 8.2 billion - [How many grains of sand are there on Earth?](https://atoneplace.net/how-many/grains-of-sand-on-earth/) — roughly 7.5 quintillion on the world's beaches - [How many ants are there in the world?](https://atoneplace.net/how-many/ants-on-earth/) — about 20 quadrillion - [How many trees are there in the world?](https://atoneplace.net/how-many/trees-on-earth/) — about 3 trillion - [How many insects are there?](https://atoneplace.net/how-many/insects-on-earth/) — about 10 quintillion - [How many species are there?](https://atoneplace.net/how-many/species-on-earth/) — about 8.7 million - [How many people have ever lived?](https://atoneplace.net/how-many/people-who-have-ever-lived/) — about 117 billion - [How many drops of water are there in the ocean?](https://atoneplace.net/how-many/drops-of-water-in-the-ocean/) — about 27 septillion - [How many fish are there in the sea?](https://atoneplace.net/how-many/fish-in-the-sea/) — somewhere between 3 trillion and 100 trillion — nobody knows - [How many species are endangered?](https://atoneplace.net/how-many/endangered-species/) — more than 45,000 assessed as threatened - [How many bees are there in the world?](https://atoneplace.net/how-many/bees-in-the-world/) — roughly 2 trillion managed honey bees - [How many birds are there in the world?](https://atoneplace.net/how-many/birds-in-the-world/) — about 50 billion wild birds - [How many bacteria are there on Earth?](https://atoneplace.net/how-many/bacteria-on-earth/) — about 5 nonillion - [How many chickens are there in the world?](https://atoneplace.net/how-many/chickens-in-the-world/) — about 26 billion alive at any moment ## Common questions ### How many earthquakes are there each year? about 20,000 located a year — around 55 a day ### How is that estimated? A global network of seismometers records ground motion; the arrival-time differences between stations fix the location by trilateration and the amplitude fixes the magnitude. Detection threshold, not seismicity, sets the annual count — as the network densified through the 20th century the "number of earthquakes" rose sharply without the Earth changing at all. ## Related pages - [How many people are there in the world?](https://atoneplace.net/how-many/people-alive-right-now/) - [How many grains of sand are there on Earth?](https://atoneplace.net/how-many/grains-of-sand-on-earth/) - [How many ants are there in the world?](https://atoneplace.net/how-many/ants-on-earth/) - [How many trees are there in the world?](https://atoneplace.net/how-many/trees-on-earth/) - [How many insects are there?](https://atoneplace.net/how-many/insects-on-earth/) - [How many species are there?](https://atoneplace.net/how-many/species-on-earth/) - [How many people have ever lived?](https://atoneplace.net/how-many/people-who-have-ever-lived/) - [How many drops of water are there in the ocean?](https://atoneplace.net/how-many/drops-of-water-in-the-ocean/) - [How many stars are there in the universe?](https://atoneplace.net/how-many/stars-in-the-universe/) - [How many countries are there in the world?](https://atoneplace.net/how-many/countries/) - [How many bones are in the human body?](https://atoneplace.net/how-many/bones-in-the-human-body/) - [How many stars are there in the Milky Way?](https://atoneplace.net/how-many/stars-in-the-milky-way/) - [How many atoms are there in the universe?](https://atoneplace.net/how-many/atoms-in-the-universe/) - [How many galaxies are there?](https://atoneplace.net/how-many/galaxies-in-the-universe/) ## Sources - United States Geological Survey — USGS (https://www.usgs.gov/) [Public domain (US Government)]