ON EARTHQUAKES, 1925-1930 303 
Mar. 20d. 2h. Focal height —0-005. 
Mar. 21d. 3h. Focal height —0-005. An alternative solution given without 
focal depth. 
Mar. 27d. 8h. Paper by A. Cavasino, see Boll. della Soc. Sismol. Ital., vol. xxviii, 
fasc. 3-4 (1928-1929). 
Mar. 29d. 5h. Focal depth +0-:060. See note in Summary, p. 96. 
Apr. 13d. 23h. Read G= —0-030. 
Apr. 18d. 19h. A revised epicentre +41-8°-+25-0° was issued after receiving 
a publication in the Bulgarian language, dealing with earthquakes 1928-1931 ; 
this epicentre was printed separately and sent out with the J.S.S. 1928, July—Sept. 
uarter. 
May 8d. 4h. Focal depth +0-070. See note in Summary, p. 154. 
May 16d. 7h. An alternative solution. 
July 8d. 1th. Read G= —0-030. 
Aug. 15d. 17h. Focal depth +0-080. See note in Summary, p. 285. 
Aug. 16d. 3h. Focal depth +0-070. See note in Summary, p. 286. 
Aug. 24d. 21h. Focal depth +0-040. See note in Summary, p. 298. 
Aug. 30d. 20h. Paper by W. Hilber, ‘ Die Herdform des Schwabischen 
Bebens am 30 Aug., 1928.’ 
Sept. 2d. 16h. See note in Summary, p. 311. 
Oct. 25d. 12h. Phases confused with next earthquake (12h. 36m. 9s.). See 
note in Summary. 
Nov. 29d. 17h. Read 29-0°S. 
Dec. 13d. 19h. Paper by B. Gutenburg; see Gerland’s Beit. zur Geophy. 
(1929, Bd. 23, S. 22-32) Das Rheinlandbeben von 13 Dez. 1928. 
Dec. 14d. th. Read th. 58m. 24s. 
Deep focus has also been applied to the following quakes : 
Feb. 18d. 14h. +0-015. Mar. 13d. 18h. +0-015; Apr. 16d. 19h. +0-005, 
May 26d. 8h. +0-:020. June 7d. 6h. +0-:070. Aug. 10d. 15h. +0:035. Aug. 
12d. 8h. +0-030. Aug. 23d. th. +0-070. Sept. 7d. 2h. +0-020. Sept. 
21d. 13h. +0-040. Oct. 21d. 16h. +0-015. Dec. 19d. 15h. +0-040. 
Notes To 1929. 
Jan. 24d. 20h. Felt by S.S. Manhattan at 12° 50’ N., 91° 2’ W. 
Mar. 7d. th. Focal depth +0-:010. See note in Summary, pp. 86-7. 
Jan. and Feb. Late readings from Karlsruhe given in Summary, p. 125. 
May 15d. 23h. An alternative solution. 
June 4d. 7h. See note in Summary, p. 226. 
June 17d. With epicentre —41-8°-+172-2°. Christchurch gives 33 S phases 
and Wellington 233 phases, either iP, iS, ori; these two stations give repetitions 
to the end of the month. 
Aug 8d. 13h. 29m., 13h. 33m. Both epicentres from Geophy. Mag. Tokyo, 
vol. iv, no. 4. 
June 27d. 12h. Paper by E. Tams in Zeitschrift fiir Geophysik, vol. iv, no. 8. 
Nov. 18d. 20h., 23h. and 19d. 2h. Epicentre given is +44-55° —55-95°; 
this has been contracted to +44-6° —55-9°. See Summary, p. 474. 
Dec. 24d. 4h. See note in Summary, p. 509. 
Deep focus has also been applied to the following quakes : 
Jan. 13d. Oh. +0-015. Feb. 1d. 17h. +0-025. Feb. 26d. 9h. +0-005. 
Mar. 3d. 3h. +0-035. Mar. 7d. 5h. +0-010. Mar. 10d. 14h. +0-025. Mar. 
17d. 12h. +0-050. Apr. 8d. 10h. +0-090. Apr. 17d. 18h. +0-015. May 
25d. 1th. +0-040. June Id. 7h. +0-025. June 2d. 2th. +0-050. June 
4d. 15h. +0-060. June 12d. 1th. +0-020. July 17d. 10h. +0-015. July 
26d. 22h. +0-010. Aug. 19d. 2h. +0-010. Aug. 19d. 20h. +0-010. Aug. 
20d. 16h. +0-010. Aug. 29d. 19h. +0-010. Sept. 3d. 12h. +0:020. Sept. 
lid. 22h. +0-010. Sept. 14d. Oh. +0:010. Sept. 21d. 18h. +0-020. Oct. 
19d. 10h. +0-015. Oct. 19d. 20h. +0-015. Noy. 15d. 18h. +0-010. Dec. 
10d: 17h. +0-025. Dec. 31d. 4h. +0-020. 
A list of readings for Karlsruhe, received too late, will be found on p. 125. 
