largest magnitude earthquake ever recorded
The 25 biggest earthquakes ever recorded Using data from the National Geophysical Data Center (NGDC), the experts at FindTheData identified the 25 biggest earthquakes ever recorded. The largest earthquake had a 9.5 magnitude, and even No. 25, an Alaskan earthquake in 1957, was measured as an 8.6. To give these chart-topping earthquakes context, the following slides visually depict the seismic activity of their respective countries both 20 years before and after.