Enter a clue or pattern or both:
The Clue
Noted U.S. seismologist (7 letter answer)
The Answer
RICHTER
Tags
Notes
The answer RICHTER is rarely seen, appearing only about once every 2400 puzzles.
Related Clues
___ scale (earthquake measurer)
___ scale
Scale developer
Seismology name
Noted U.S. seismologist: 1900-85