Earthquake strength is registered on the moment magnitude scale, which measures how much energy was released when the rocks along a fault moved during the quake. By Henry Fountain Earthquake strength ...

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 ...

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 ...

Earthquakes are becoming increasingly frequent. On Sunday morning, four earthquakes struck parts of India, Myanmar, and Tajikistan within just one hour, sending tremors across central and South Asia.

One of the most commonly known earthquake-measuring tools is the Richter Scale, but the system is no longer used today. In fact, the Richter scale was replaced in the 1970s by other magnitude scales ...

Earthquakes near the very top of the magnitude scale are difficult for scientists to measure. For one thing, they occur rarely -- once a year or less -- so researchers don't have many chances to ...