Scientists have identified roughly 190 confirmed impact craters on Earth, but models suggest that many more once existed and have been erased by erosion, plate tectonics, and sedimentation over geologic time.

Quick Scoop: The crater count

  • Current catalogues list about 188–190 scientifically confirmed terrestrial impact craters.
  • These known craters range from only tens of meters across to giant multi‑hundred‑kilometer structures like the Vredefort impact structure in South Africa.
  • Statistical impact‑rate calculations indicate Earth should have had far more recognizable craters, but most have been destroyed or buried by our planet’s very active geology.

Why the number seems “small”

Earth looks much less cratered than the Moon or Mars because:

  • Erosion and weather : Wind, rain, glaciers, and rivers steadily wear down and soften crater rims and fill basins over millions of years, eventually erasing them.
  • Plate tectonics : Oceanic crust is continuously recycled into the mantle at subduction zones, so any ancient ocean‑floor craters are completely lost; even continental craters can be warped or buried by mountain‑building and faulting.
  • Sedimentation and vegetation : Sediments, lava flows, and even thick soil and forests can hide older impact structures, so some craters are only detected with geophysical surveys and drilling rather than by obvious surface rings.

How often do large craters form?

  • On average, impacts big enough to make a crater about 20 km wide occur on Earth roughly once every one to three million years, based on inner solar system impact rates and crater statistics.
  • That frequency implies there should be many more relatively young, medium‑to‑large craters than are currently known, highlighting how incomplete the visible record is.

Hidden history beneath our feet

  • Researchers use satellite imagery, gravity and magnetic surveys, and field work to keep adding to the global crater database, so the official count slowly increases as new structures are confirmed.
  • Some suspected structures never make it into the confirmed list because they turn out to be volcanic calderas or other geological features, so the “confirmed” number stays relatively conservative even as candidates are proposed.

TL;DR: Earth has about 190 confirmed impact craters , but geologic processes have erased the vast majority of craters formed over billions of years, so the planet’s true impact history is far richer than the visible scars suggest.

Information gathered from public forums or data available on the internet and portrayed here.