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 ...
朝日新聞社

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

A powerful 7.5-magnitude earthquake struck off northern Japan late Monday, injuring more than 20 people and triggering a tsunami of up to 70 centimeters (28 inches) in Pacific coast communities, officials said. The Japanese government was still assessing ...
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 ...
ABC7

4.3-magnitude earthquake strikes Inland Empire, shaking felt across SoCal

MUSCOY, Calif. (KABC) -- A 4.3-magnitude earthquake struck the Inland Empire Thursday morning, with shaking felt across Southern California. That quake hit just after 9:30 a.m. in the Muscoy area at a depth of just over three miles, according to the U.S ...
CBS News

Hey Ray: Earthquake magnitudes

PITTSBURGH (KDKA) - In scientific fields, numbers are everywhere. Knowing what those numbers mean is easier to understand in some cases, and in other cases, not so much. An earthquake's magnitude, on the other hand, might be harder to understand.
Time

Japan Issues ‘Megaquake’ Warning: What to Know

A collapsed road in Tohoku in Aomori Prefecture, northeastern Japan, on Dec. 9, 2025. Reporter A “megaquake” could occur along Japan’s main island north coast in the coming week, authorities said in a rare warning after a 7.5-magnitude tremor shook ...
ABC7 San Francisco

7.0 magnitude earthquake strikes off Northern California coast, tsunami warning canceled

SAN FRANCISCO (KGO) -- A 7.0 magnitude earthquake was reported off the coast of Northern California on Thursday, according to the United States Geological Survey. The epicenter of the "strong" quake was off the coast near Petrolia, in Humboldt County, the ...
Hosted on MSN

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

TOKYO (AP) — 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. The Japanese government was still assessing damages from the tsunami and late-evening quake...
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