Find the magnitude R of an earthquake of intensity $I \left( \text { let } I _ { 0 } = 1 \right. \text { ) }$ . $I = 16000$
A)3.20
B)5.20
C)4.20
D)2.20
E)6.20

Question

Find the magnitude R of an earthquake of intensity $I \left( \text { let } I _ { 0 } = 1 \right. \text { ) }$ .​ $I = 16000$ ​
A)3.20
B)5.20
C)4.20
D)2.20
E)6.20

Quizplus · Accepted Answer

The magnitude R of an earthquake can be calculated using the formula:
R = (I - 1.76)/1.44
where I is the intensity in logarithmic scale (in decibels).

Substituting the given intensity values, we get:
R = (11ea99db_b57b_d3dc_94ac_a3be31b1c8f7_TB4590_11 - 1.76)/1.44 
= (11 - 1.76)/1.44 
= 4.17

Round off to one decimal place, we get R = 4.2.

Therefore, the best choice is C) 4.20.

Find the Magnitude R of an Earthquake of Intensity I( let I0=1 ) I \left( \text { let } I _ { 0 } = 1 \right. \text { ) }I( let I0​=1 )

Find the Magnitude R of an Earthquake of Intensity $I \left( \text { let } I _ { 0 } = 1 \right. \text { ) }$