| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| This scientific instrument records P waves, S waves & surface waves | a seismograph | $400 | DJ | SCIENCE | 2021-06-11 | #8420 | |
| "S" is for this machine that records big earth vibrations | a seismograph | $400 | DJ | DICTIONARY OF SCIENCE | 2015-04-10 | #7045 | |
| This instrument for detecting & recording earthquakes is basically just a large pendulum | a seismograph | $600 | DJ | SCIENCE | 1991-09-16 | #1616 |