An earthquake with a magnitude of about 2.0 or less is called a microearthquake. It is not usually felt. The intensity of an earthquake with a magnitude of 2 is how many times greater than the intensity of an a standard earthquake?

Magnitude is a measure of earthquake size and remains unchanged with distance from the earthquake. Intensity, however, describes the degree of shaking caused by an earthquake at a given place and decreases with distance from the earthquake epicentre .

According to the question

we are considering the standard magnitude to be 4

now,

if Richter scale shows 2 as its reading, it doesn't mean the magnitude is 2.

it is actually measured by logarithm

let, the required value is X

㏒[tex]10^{X}[/tex] = 2

> X = [tex]10^{2}[/tex] = 100

standard magnitude=4 (supposition)

㏒[tex]10^{Y}[/tex] = 4

> Y = [tex]10^{4}[/tex] = 10000

so,

the intensity of earthquake with magnitude 2 comparing to the intensity of earthquake with magnitude 4 is

X/Y = 100/10000

X/Y = 1/100

> X = Y/100

so the intensity is decreased by 100 times

Hence, intensity of a standard earthquake is from 2.5 to 5.4

To learn more about magnitude and intensity of earthquake from here

https://brainly.com/question/24256134

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