Also Known As:
- Terremoto
- Erdbeben
- Földrengés
- Jordbävningen
- Jordskælv
- Maanjäristys
- Seismos
- Terramoto
- Tremblement de terre
- Trzesienie ziemi
- Zelzele
- Mark Robson
- George Fox
- Mario Puzo
- Charlton Heston ... Graff
- Ava Gardner ... Remy
- George Kennedy ... Slade
- Lorne Greene ... Royce
- Geneviève Bujold ... Denise (as Genevieve Bujold)
- Richard Roundtree ... Miles
- Marjoe Gortner ... Jody
- Barry Sullivan ... Stockle
- Lloyd Nolan ... Dr. Vance
- Victoria Principal ... Rosa
- Walter Matthau ... Drunk (as Walter Matuschanskayasky)
- Monica Lewis ... Barbara
- Gabriel Dell ... Sal
- Pedro Armendáriz Jr. ... Chavez (as Pedro Armendariz Jr.)
- Lloyd Gough ... Cameron
- John Randolph ... Mayor
- Kip Niven ... Walter Russell
- Scott Hylands ... Asst. Caretaker
- Tiger Williams ... Corry
- Donald Moffat ... Dr. Harvey Johnson
- Jesse Vint ... Buck
- Alan Vint ... Ralph
- Lionel Johnston ... Hank
- John Elerick ... Carl Leeds
- John S. Ragin ... Chief Inspector
- George Murdock ... Colonel
- Don Mantooth ... Sid (as Donald Mantooth)
- Michael Richardson ... Sandy
- Alex Brown ... Pool Player (as Alex A. Brown)
- Bob Cunningham ... Dr. Frank Adams
- John Dennis ... Brawny Foreman
- Gene Dynarski ... Dam Caretaker
- Bob Gravage ... Farmer Mr. Griggs
- H.B. Haggerty ... Pool Player
- Tim Herbert ... Las Vegas Man
- Dave Morick ... Technician
- Ines Pedroza ... Laura (as Inez Pedroza)
- Josh Albee ... Boy with Radio
- Joan Blair ... Pawnbroker's Wife (TV version)
- Hal Bokar ... Dam Workman #1
- Vivian Brown ... Woman #1
- Ian Bruce ... Officer Scott - Wilson Plaza
- William H. Burton ... Stranger
- Ric Carrott ... National Guardsman
- David S. Cass Sr. ... Sherriff Merle - Slade's Nemesis
- Lonny Chapman ... L.A.P.D. Captain
- Sam Chew Jr. ... Tony - Kathie's Husband
- Shannon Christie ... Dr. Vance's Nurse
- Patty Elder ... Blonde Secretary in Royce Building
- Kenny Endoso ... Bar Cook
- Robert C. Ferro Jr. ... Sports Car Thief
- Bruce M. Fischer ... Man #1
- James W. Gavin ... Helicopter Pilot
- Ernest Harada ... Seismologist
- Jerry Hardin ... Man #2
- Diana Herbert ... Woman #2
- Bert Kramer ... Policeman
- Karl Lukas ... Man #3
- Jimmy Nickerson ... Seismology Graduate Student
- Stuart Nisbet ... Loudspeaker Voice (voice)
- Frances Osborne ... Housewife
- Grant Owens ... Police Officer
- Charlie Picerni ... Pool Player
- George Sawaya ... Deputy Sherriff
- Fred Scheiwiller ... Jay the Bartender
- Debralee Scott ... Kathie (TV version)
- Dean Smith ... Pool Player
- John Tuell ... Prop Tractor Driver
- Kitty Vallacher ... Grocery Store Clerk
- Keith Walker ... Radio Voice (voice)
- Sandy Ward ... Studio Guard
- Dick Warlock ... Diver at Hollywood Reservoir
- William Whitaker ... Ambulance Driver
- Don Wilbanks ... Dam Workman with Blowtorch
- Forrest Wood ... Man #4
- Clint Young ... Dam Workman #2