•±00 E. 8. Hoi den — Earthquakes in California. 



October 24, 2:50 a. m.— East Oakland : (V) Mr. Blinn's 

 Observatory. The duplex seismometer plate shows a trace 

 from S. to N". in general direction. The first trace on the 

 plate is that of a single wave about 2m. in amplitude 

 (magnified four times) followed by small tremors. — Chabot 

 Observatory : the plate of the duplex seismometer shows the 

 first wave strongly towards the N.E. The trace of this wave 

 (magnified four times) is a straight line 6 mm long. This is 

 followed by two waves of the earth as it regained its original 

 position. The motion of the earth is contrary to that of the 

 pen on the plate. 



October 25, in the night. — Mr. Blinn's Observatory. The 

 duplex seismometer gives a tremor, and the general direction 

 of the trace on the plate is S.E. to N.W. 



November 4, 3:36 a. m.— Lick Observatory (VI).— E. S. H. 

 Mr. Barnard gives the time as 8h. 37^m., plus or minus -| m. 

 The duplex seismometer gives a very complex knot of curves 

 ending by a trace on the plate towards the S.W. The trace on 

 the Milne seismometer (in cellar of the Meridian Circle House) 

 cannot be interpreted, as the instrument had just been set up 

 and probably was not adjusted properly. 



November 18, 2:28 p. m. — S. E., 917 Pine street : two shocks 

 north and. south (VII) registered on seismometer. Another 

 light shock at 5:38 p. m.— J. R J.— San Eafael : 2:30 p. m., 

 1ST. and S.— Oakland : 2:29 P. m.; one chimney fell (VII?).— 

 Berkeley: 2:28 p. m.; duration 7 sec; a third shock at 5:35 

 P. M. (S. E. Examiner, Nov. 19.) 



Lick Observatory : not felt, not registered. — Chabot Obser- 

 vatory : 2h. 27m. 53s., very sharp shock ; 3:30, slight ; 5h. 

 37m. 20s., sharper than the second shock. The duration was 

 3 sec. The trace on the duplex seismometer is a very com- 

 plicated, circular knot of 5 to 6 mm diameter (magnified four 

 times) with a looped excursion of the pen toward the east 

 gmm f rom t ne center of the knot, and another straight one 

 from the center to the W.S.W , also of 6 mm . All three shocks 

 are on this single plate. — In Oakland no real damage was done. 

 Two or three chimneys were overthrown and panes of glass 

 were broken (VI, or VII ?).— East Oakland : 2:29 P. M., N. to 

 S., duration 2 sec; 3:45 p. m., very light ; 5:36 p. m\, E. to W., 

 duration 2 sec. — (S. F. Bulletin, Nov. 19). — Napa : 2:36 p. m., 

 duration 10 sec. — S. F. Chronicle, Nov. 19. — Haywards, San 

 Leandro, Niles : not felt. — Mr. Burckh alter. — Clear Lake : not 

 felt.— Capt. R S. Floyd. 



It is also reported by Capt. Edmundson of the ship " Drum- 

 lanrig," that he found soundings of 35 fathoms, 35 miles S.W. 

 of the Farallones where no shoal is now known to exist. This 

 point will be determined by the proper authorities. It is 



