44 



REPORTS ON THE STATE OF SCIENCE. 



List of Strong Shocks — continued. 



Date 



1899 Sept. 3 to 

 10 ; Sept. 10 

 to 17 



1899 Dec. 25, 

 4.29 a.m. 



1900 Oct. 9 . 



1901 Dec. 30-31 



1902 July 27, 



11 P.M., 



to 31 

 1902 Sept. 22 



1902 



1905 



1906 



1906 



Nov. 17, 

 M.S.T. 



12.53 p.m. 



Dec. 23, 



P.S.T., 



2.23 p.m. 



Jan. 25, 

 M.S.T., 

 1.32.30 



P.M. 



6.36. 

 p. 

 7.31 



April 18, 

 P.S.T., 

 5.11.58 



A.M. 



36.7 ] 



P.M. I 

 1 P.M. J 



1906 



1906 



1906 



April 18, 



P.S.T., 



4.26 p.m. 



July 12, 



M.S.T., 



5.15 A.M. 



July 16, 

 M.S.T. , 

 12 noon 



Place 



Intensity 



Yakutat 

 Alaska 



Bay, 



Remarks 



III 



Santa Jacinto, 

 Riverside Co., 

 S. California 



Prince William j III 



Sound, Alaska | 

 Kenai, on Cook ! [ (?) 



Inlet, Alaska 



Los Alamos.Cal., 

 and neighbour- 

 hood 



Guam . 



Washington Co. 

 S.W. Utah 



Bakcrsfield, 

 California 



Flagstaff, 

 Arizona 



Along coast of 

 California 



Brawley, S.E. 

 California 



Socorro, New 

 Mexico 



Socorro, New 

 Mexico. 



II-III 



I or 



less. 



Ill 



(References.- — Nat. Geog. Mag., x., 

 421 ; Tarr, ' Recent Changes hi 

 Alaska,' Oeog. Jour., 1906, pp. 30- 

 43; L. Martin is publishing a 

 U.S.G.S. Bull, on these earth- 

 quakes, 1910.) Felt from Lynn 

 Canal to Aleutian Islands. Some 

 islands said to have settled 20 

 to 25 feet. Strongest shock on 

 September 10. The ' Bonanza ' 

 passed between Amukhta and 

 Yumaska Islands (Aleutian Is- 

 lands) on September 17 ; both 

 islands are volcanic cones and 

 great clouds of smoke were issuing 

 from both. 



Shocks continued. Thirty on 25th 

 day, others on the 26th day. Felt 

 from San Diego, California, to 

 Seligman, Arizona. 



Felt over an area of 121,000 square 

 miles on land. (M. ) 



A strong volcanic eruption. Earth- 

 quake which accompanied it 

 caused several tidal waves. 



(Peterm., Milt., 1905, li., p. 40). 

 180 shocks experienced in 24 hours. 



Three shocks. 



Duration 20 sec. Probably in San 

 Francisco mountains, north of 

 Flagstaff. 



. ^ - J . . _. L~ 

 After-shocks. 



Disastrous shock which destroyed 

 San Francisco and did serious 

 damage in many other cities. 

 The earthquake was caused by a 

 movement on the San Andreas 

 fault for a length of 270 miles. 

 Many after-shocks. (See Rep. Gal. 

 Eq. Com.) 



Duration 10 sec. Probably felt 

 over an area of 30,000 square miles. 



Many shocks between July 2, 1906, 

 and end of year. Probably felt 

 over 60,000 square miles. 



Probably felt over 60.000 square 

 miles. 



