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4. | What is the name of the CalTech seismologist who invented the scale used to measure the magnitude of earthquakes? | |
A. | Charles Richter | |
B. | Hiram Walker | |
C. | Giuseppe Mercalli | |
D. | Joshua Rumble | |
Answer: Option A | |
Explanation: | |
Richter was born on an Ohio farm in 1900. He died in 1985. |
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