Magnitude 7.5 quake in northern Japan injures 23 people and triggers a 2-foot tsunami

A powerful 7.5 magnitude earthquake struck off northern Japan late Monday, injuring 23 people and triggering a tsunami in Pacific coast communities, officials said. Authorities warned of possible aftershocks and an increased risk of a megaquake.

Relentless earthquake swarms rattle California. What does that mean for the Big One?

For more than a month, the Bay Area has been subjected to a seemingly ceaseless stampede of earthquakes, rattling windows and raising fears across California.
abc7NY

Earthquake scale: How they are measured and what the magnitude and intensity scales mean

Earthquakes and seismic activity often happen with sudden movements underground with tectonic plates. Seismographs are used by scientists to measure the time, location and strength of an earthquake. Magnitude illustrates the strength of an earthquake ...
The New York Times

Here’s How Earthquakes Are Measured

What does “moment magnitude” mean, and how do scientists determine the strength of a rupture in the earth? By Henry Fountain Henry Fountain spent a quarter century covering science for The Times. He retired in 2023. Seismologists register the intensity ...