| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| In the 1930s this Caltech seismologist devised a way to determine the magnitude of earthquakes | (Charles) Richter | $1,600 | DJ | DISCOVERERS & INVENTORS | 2013-02-11 | #6541 | |
| Seismologist who developed most common system for measuring earthquakes | (Charles) Richter | $600 | DJ | INVENTIONS | 1985-03-27 | #143 |