Shearer's website for Introduction to Seismology

This site currently has a list of errors in the 2nd edition of Introduction to Seismology. It is also a placeholder for possible additional material. Please also see the CUP site for the book, which has figures, computer codes, supplemental material, and solutions to the exercises (registered instructors only).

Errata

  1. p. 21, 3rd line of last paragraph, "principle" should be "principal"
  2. p. 23, section 2.1.4, 4th line, "principle" should be "principal"
  3. p. 41, just after equation 3.5, d_j should be partial_j
  4. p. 45, 3rd line from bottom, should say "rewrite the elastic wave equation (3.19)" not "(3.18)"
  5. p. 52, line 10, "propagation" is misspelled as "propogation"
  6. p. 58, equation 3.60, 1/3 should be 1/6
  7. p. 71, Example 4.2.1, the 0.1677's should be 0.1667's (i.e., 1/6).
  8. p. 79, Fig. 4.11, label at top of 2nd column should be T(X), not T(x).
  9. p. 164-165, Example 6.6.1, A(10 Hz) = 0.073 not 0.0073, and thus it has 7.3% of its amplitude at 10 Hz.
  10. p. 168, line 5, "Q decreases" should be "Q^-1 decreases" or "Q increases"
  11. p. 177, section 6.6.8, line 7, "at" should be removed from "at during"
  12. p. 233, 5th line below equation (8.43) should say "The azimuthal order number, m" (not angular order number)
  13. p. 236, last sentence of second full paragraph, "can be using" should be "can be used"
  14. p. 247, footnote should have space in "N m"
  15. p. 250, The two sentences following equation (9.16) for the decomposition of the moment tensor into two double-couple sources are incorrect. They should state: "where in this case the eigenvalues are sorted such that |sigma_1| > |sigma_2| > |sigma_3|, (a different sorting than we use for (9.14) and (9.17), for which |sigma_2| < |signma_1|, |sigma_3|) and we have used sigma_2 = -sigma_1-sigma_3. The larger (first) and smaller of the two terms are called the major and minor double couples, respectively." Note that the major and minor double couples do NOT become nearly equal in size as sigma_2 approaches zero; thus there is no a priori reason to prefer the CLVD decomposition of (9.15).
  16. p. 251, 3 lines before section 9.3. Ekstom should be Ekstrom.
  17. p. 262, 3rd line from end of section just before 9.4.1 Directivity. "0.52 and 0.63 for P and S waves, respectively" should be "0.42 and 0.59 for P and S waves, respectively" The 0.52 and 0.63 numbers are the RMS values, not the average values. The spherically averaged values of 0.42 and 0.59 are the appropriate parameters to use in equation 9.27.
  18. p. 298, text for Exercise 7 should end with "its average P value of 0.42." See correction for p. 262.
  19. p. 346, line 3. "than anisotropic" should be "that anisotropic"
Many thanks to Peter Gerstoft, Heidi Houston, Guy Masters, Sunyoung Park, Anne Sheehan, Kristen Sherman, and Alex Song for alerting me to these.

Please send information about additional errors to Peter Shearer