VOL. 21, 1909, PL. 30 



BULL. GEOL. sou. «m. 'Tnlrvn 



Great Alasea Earthquakes, observed at Hongc Tokyo. 



EW Component. Multiplication = 10 



Earthquake of Oct. 9, 1900 ; 9^ 37"^ 14^ P.M. 



l_C- Instrument. "[ 

 Time : 1. tick interval=l minute. 



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TOKIO SEISMOGRAMS OF ALASKAN EARTHQUAKES 



