Use the Formula . ​

question 77

Multiple Choice

Use the formula . ​
The San Francisco earthquake of 1906 measured 8.25 on the Richter scale, and the San Francisco earthquake of 1989 measured 7.1. How much more intense was the 1906 quake?
​

• A)0.3 times as severe.
• B)1.5 times as severe
• C)5.7 times as severe
• D)10.8 times as severe
• E)14.1 times as severe