MUSEUM OF COMPARATIVE ZOOLOGY. 



31 



From January, 1909, to about June 1st, no satisfactory records 

 were obtained of several earthquakes other than those indicated 

 in the remarks. The tangled and interlaced records indicated 

 were caused by the crowding of lines in the slow wanderings above 

 described or during diurnals. 



It will be noted that in the Tacna, Chile, earthquake of May 

 17, 1909, no preliminary tremors were recorded on the east-west 

 component, that standing N-S. in the direction of wave path, a 

 feature before noted at Washington by Marvin in regard to shocks 

 on the south as in the case of the Jamaica earthquake of Jan. 14, 

 1907. The data given in, the column "Duration of earthquake" 

 should be understood as approximate, probably under rather than 

 in excess of the time during which the ground at the Station is in 

 tremulous motion. The records serve to show that the sands and 



since April 8, 1908. 



Duration 



Distance 



Max. 

 Range 



on 

 drum, 

 mm. 



Pend. Period. 

 Component. 



Remarks. 



Of first 

 P. T. 



h. m. s. 



Of all 

 P. T. 



h. m. s. 



1+ A = 



V 2 -Vi 

 Miles 



3A = 

 B-Vi 

 Miles 



6 57 



16 02 



3197 



2920 



45 



25 A 



Not located. 



4 33 



12 15 



2511 





11 



24 B 





6 32 



14 48 



3063 







B 





4 42 



7 44 



1603 





2 



24 B 



no P. T. on A. 



8 14 



15 05 



3125 





100 



11 B 





7 06 



14 16 



3800 





12 



28 A 





7 10 



15 08 



3831 



3112 



13 



28 



Messina earthquake. 















Tangled record; Persia. 











42B 





No P. T. on B. Tacna, Chile. 















Undecipherable. Beloit, Wis. etc. 



17 50 



50 10 



*10457 



9189 



20 



50 A 



Sumatra; Padang, etc. 



? ? ? 



11 54 





2646 





A 





5 55" 



13 56 



3055 



*2920 



150B 



28 B 



Acapulco, Mexico. 



4 58 



13 28 



*2733 



3187 



32B 



25 A 



Mexico. 



? 



? 



? 



? 



1 



25 



Quivers with 15 to 20s. period. 



5 5 



12 28 



2640 



2585 



68 



25 A 



Mexico. 











1 



25 A,B 



Shocks in the Canal Zone. 



3 50 



6 44 



1500 





3B 





Not located. 















Quake in Rome, Italy: no trace. 



* Corrected by Benndorf's formula. 

 ? Not definitely determinable. 



