ON EARTHQUAKES, 1925-1930 301 
Notes To 1926, 
Jan. 1d. 21h. Felt by S.S. Essequito in Lat. 23° 26’ S., Long. 70° 40-5’ W. 
Feb. 1d. th. Focal depth +0:025. See note in Summary, p. 27. 
Feb. 7d. 2h. Focal depth +0:040. Alternative solution. 
Feb. 8d. 15h. See note to Feb. 15d. 2h. in Summary, p. 44. 
Feb. 9d. 0h. Focal depth +0:090. See note in Summary, p. 38. 
Feb. 15d. 2h. Focal depth +0:015. See note in Summary, p. 44. 
Mar. 7d. 20h. An alternative solution. 
Mar. 18d. 14h. This may be two shocks. 
Mar. 25d. 19h. An alternative solution with focal depth -++0-020 is given. 
May 20d. 7h. Suggested by Batavia. But +5-5°+4124-5° as on 1918. 
Sept. 5d. would suit the records better. 
June 5d. 9h. Focal depth +0-035. See note in Summary, p. 137. 
June 19d. 1th. Epicentre given in U.S. Coast and Geodetic Survey Report, 
p. 55; but most stations would be better suited by an epicentre further E., as on 
1925 Sept. 10d. 
June 20d. 6h. Focal depth +0:020. See note in Summary, p. 149. 
June 24d. 21h. Focal depth +0-020. An alternative solution given with 
focal depth +-0-030. 
June 26d. 19h. See note in Summary, p. 155. 
June 29d. 14h. Focal depth +0-020. See note in Summary, p. 167. 
June 29d. 18h. Epicentre given by U.S. Coast and Geodetic Survey Report, 
p. 56. 
July 26d. 18h. Focal depth +0-050. See notes in Summary, pp. 177, 21 ie 
July 30d. 13h. See paper by H. Jeffreys in Geophy. Supp. M.N.R.A.S., 
vol. i, p. 484, June 1927. 
Aug. 5d. 2h. See note in Summary, p. 225. 
Aug. 6d. 16h. See note in Summary, p. 234. 
Aug. 9d. 3h. Large negative residuals near A =35-0° are noteworthy. 
Aug. 15d. 3h. See paper by H. Jeffreys in Geophy. Supp. M.N.R.A.LS., 
vol. i, p. 489, June 1927. 
Sept. 7d. 12h. Focal depth +0-020. See note in Summary, p. 279. 
Sept. 9d. 17h. See note in Summary, p. 281. 
Sept. 16d. 17h. Focal depth +0-020. See note in Summary, p. 293. 
Sept. 19d. 20h. See note to 9d. 17h.; difficulties are here increased by a local 
European shock ; three alternative solutions are given. 
Sept. 30d. 5h. Focal depth +0-080. See note in Summary, p. 308. 
Oct. 3d. 19h. A long series of [P] is noteworthy. 
Oct. 8d. 19h. See note in Summary, p. 324. 
Oct. 22d. 12h. See Bull. Seis. Soc. Amer., vol. xviii, no. 3, p. 153; paper by 
G. D. Mitchell. 
Nov. 5d. 7h. Focal depth +0-020. See note in Summary, p. 373. 
Dec. 9d. 12h. See note in Summary, p. 397. 
Dec. 10d. 8h. Several stations suggest a change of Ty to about 20s. later. 
Dec. 16d. 0h. See note in Summary, p. 401. 
Dec. 18d. 14h. See note in Summary, p. 406. 
Dec. 20d. 10h. See note in Summary, p. 408. 
Dec. 25d. 15h. See note in Summary, p. 412. 
Deep focus has also been applied to the following quakes: 
Jan. 15d. 14h. -+-0-060. Mar. 16d. 17h. +0-020. Apr. Id. 16h. +0-°045. Apr. 
13d. 2h. +0:020. May 26d. 9h. +0-020. Sept. 10d. 10h. +0-013. Sept. 10d. 
19h. --0-030. Sept. 11d. 12h. +0-013. Sept. 17d. th. 2h. 5h. +0-020. Sept. 
29d. 12h. +0:040. Oct. 30d. 13h. +0-070. Nov. 6d. 9h. +0-015. Nov. 6d. 
9h. 53m. +0-:015. 
A list of readings for Kew received too late, will be found on pp. 416-426 in 
the Summary. 
Notes To 1927. 
Jan. 11d. 19h. For La Paz A read 9-9°. 
Jan. 12d. Oh. A revised epicentre +15-0°-+119-7° was issued separately in 
the Summary. 
