1. Subject to or caused by an earthquake or earth vibration
   - seismic

See also: seism, unstable

• Sir Charles Scott Sherrington
• Sir Charles Spencer Chaplin
• Sir Charles Wheatstone
• Sir Charles William Siemens
• Sir Christopher Wren
• Sir Clive Marles Sinclair
• Sir David Alexander Cecil Low
• Sir David Bruce
• Sir David Low
• Sir Edmund Hillary
• Sir Edmund Percival Hillary
• Sir Edward Elgar
• Sir Edward Victor Appleton
• Sir Edward William Elgar
• Sir Edwin Landseer Luytens
• Sir Edwin Lutyens
• Sir Ernst Boris Chain
• Sir Francis Bacon
• Sir Francis Drake
• Sir Francis Galton
• Sir Frank Whittle
• Sir Fred Hoyle
• Sir Frederick Ashton
• Sir Frederick Gowland Hopkins
• Sir Frederick Grant Banting