OBSERVATORIES AND THE DATA OBTAINED, 85 
The instruments used were Bosch-Omori horizontal pendulums, two components; 
mechanical registration on smoked paper. 
(1) North and (2) east components: T', 60 seconds; M, 10kg.; L, 75 cm.! 
First PRELIMINARY PRINCIPAL Max 
TREMORS. Parr. AMPLITUDE. 


min. min. min. mm. 
(1) North component . 28 57 to 12 59 to O1 150 +? 
(2) East component . 51 54 to 04 57 to 03 150 + ? 

MUNICH, GERMANY. 
Kgl. Observatorium fiir Erdmagnetismus und Erdbebenstation. Dr. J. B. Messer- 
schmitt, director. 
Lat. 48° 09’ N.; long. 11° 36.5’ E. ; altitude, 530 meters; distance, 84.75° or 9,423 km. ; 
chord, 8,587 km.; direction, N. 29° E. 
Seismograms, sheet No. 5. 
The instrument used was a Wiechert inverted pendulum. 
(1) North and (2) east components: J), 12.1 seconds; V, 200; J, 7,300 meters; e, 6.0; 
M, 1,000 kg.; L’, 36.6 meters. 



First SECOND 
Reeu E , 
PRELIMINARY EpSLiMInany Ww ae Max. AMPLITUDE. | PerRIOD. aces. 
Micw- 8 m. 8. m 8. min. mm, sec. 
(1) North component] 25 00 35 26 52 00 04 80 + r¢ 
(2) East component 25 00 35 41 ol 26 58 80 + 20 
Average .. . 25 00 35 «34 ol 43 
Intervals.)  -. Pe By 23 06 39 Lo 







At 13" 52™ the north component of the earth’s movement is 0.47 mm., and the east 
component 1.26; a possible total of 1.35 mm.; this is during the long waves. During the 
principal part at 13" 58”, the east indicator went beyond the limits, indicating an earth- 
amplitude of more than 1.25 mm.; at the same time the north indicator showed an earth- 
amplitude of 0.77 mm.; that is, the total amplitude was possibly greater than 1.47 mm. 
At 14" 05™ the north indicator exceeded the limits; and after that time no further 
record was made. 
It is possible that the regular waves should be put about 4 minutes earlier; but the 
phase here taken is evidently the same as that taken for the regular waves at Jena. 
SAN FERNANDO, SPAIN, 
Instituto y Observatorio de Marina. Capitan Thomas de Azcarate, director. 
Lat. 36° 28’ N.; long. 6° 12’ W.; altitude, 28 meters; distance, 85.25° or 9,478 km.; 
chord, 8,628 km.; direction, N. 46° E. 
Foundation, solid rock. 
Seismograms, sheet No. 1. 
The instrument used was a Milne horizontal pendulum, east component; photographic 
registration; J’, 20 seconds; V,6.1; J, 600 meters; ¢, 1.13; M, 255 gm.; L, 15.6 cm. 
1 The times at Moscow are taken from an article by Dr. E. Leyst in the Bulletin of the Naturalists 
of Moscow, Nos. 1 and 2, 1906. They are given to minutes only. It is evident that the beginning was 
not recorded, and the identification of the phases actually recorded is uncertain. 
* Off paper. 

