230 EARTHQUAKES ON THE PACIFIC COAST 



1894. September 30; Mount Hamilton. 



The record of a single vibration was found on the duplex seis- 

 mograph on the morning of October 1. The seismographs were 

 examined on the evening of September 30 and again on the morn- 

 ing of October 1, when the record was noticed, so that the shock 

 must have occurred in this interval, although it was not felt 

 by any one here and did not start the Ewing instrument. The 

 displacement of the earth was about 0.25 mm. 



Eureka: Two heavy earthquake shocks occurred here this morn- 

 ing, the first at 9.36 o'clock, lasting nearly half a minute. The 

 vibrations were from north to south. The second was at 9.59 

 o'clock, the vibrations being from northeast to southeast. It 

 lasted five seconds. No damage. 



Sisson: A slight earthquake shock was felt in this vicinity this 

 morning. The vibrations were from north to south. — S. F. 

 Chronicle. 



Hydesville: 9.37 a. m., qiiite heavy, 10.22 a. m., very light. 



1894. September 30; Bdmanton (Cal.); 9:30 a. m. 



A slight shock. 



1894. October 17; Pasadena; 3:05 p. m. local time. 



A severe triple shock. 



1894. October 23; San Dieso (6:03 p. m. ?). 



Two very heavy shocks. Clocks stopped, etc. (VI). A third shock 

 at 7.25 p. m. Very light. 



1894. October 23; San Diego. 



This city and neighboring towns were visited this afternoon by a 

 series of earthquakes of more than ordinary severity. The first 

 shock occurred at (3.03 p. m.?) and was followed at intervals of 

 a quarter of a minute by two others, the last being one of the 

 strongest experienced hereabouts since the advent of Americans. 

 People in brick houses swarmed into the streets, hearing the 

 grinding of brick and mortar and seeing in some cases the walls 

 crack (VII?, VIII?). A loud noise was heard in all parts of the 

 city immediately preceding the shock. Considerable consterna- 

 tion was caused in the public schools. 



The second shock was observed by few people, being very light, 

 but the third was so pronounced as to bring the people into the 

 streets without delay (VII?). Messages from Coronado, Upper 

 Otay Dam, Campo, National City and other places showr that the 

 earthquake was felt about equally at all surrounding points. 

 Loose rocks were shaken from the hillsides and rattled down the 

 canyons, and a heavy booming noise accompanied the tremors. 

 The weather observer reported another slight shock at about 4.25 

 o'clock, not so strong as the first ones, but quite perceptible. It 



