magnitude

B2 · Upper Intermediate Countable noun Science Technical

n. a number that shows how much energy an earthquake releases.

n. a quantitative measure of the energy released by an earthquake, typically recorded on the Richter scale or moment magnitude scale.

日本語:マグニチュード※

“The earthquake had a magnitude of 7.2, causing damage to many buildings.”

“Seismologists reported that the magnitude of the aftershock was significantly lower than the initial quake, though it still posed a risk to unstable structures.”

C1 · Advanced Countable noun Astronomy Technical

n. a number that measures how bright a star or planet looks from Earth.

n. a logarithmic measure of the brightness of a celestial body, where lower numbers represent greater luminosity.

日本語:等級※

“Sirius is the brightest star in the night sky and has a very low magnitude.”

“The telescope is capable of detecting distant galaxies with a visual magnitude far beyond the reach of the naked eye.”

C1 · Advanced Countable noun Mathematics Technical

n. the length or size of a mathematical object, like a vector.

n. the absolute value of a real number, or the length of a vector in Euclidean space.

“To find the vector's magnitude, you need to use the Pythagorean theorem.”

“In physics, velocity is a vector quantity because it accounts for both the magnitude of speed and the direction of travel.”