﻿C. G. Bochwood, Jr. — American Earthquakes. 17 



of Sept. 26, of which five are in small type. They may be geo- 

 graphically classified thus : 



Canadian Provinces ., 8 



New England 5 



Atlantic States ^ 9 



Mississippi Valley 3 



Pacific Coast of U. S. 34 



Alaska 2 



Mexico _• 1 



Central America 2 



West Indies .- 2 



Ecuador _ 1 



Peru and Chili 3 



Argentine Republic _ 1 



71 



By seasons they are classified thus: Winter, 24 (Dec. 8; Jan. 

 9; Feb. 7); Spring, 22 (Mar. 8; Apr. 11; May 3); Summer, 

 14 (June 3; July 6; Aug. 5); Autumn, 11 (Sept. 2; Oct. 7; 

 Nov. 2); Spring and Summer together, 36 ; Autumn and Win- 

 ter together, 35. 



Those estimated as having an intensity of VI or over, on the 

 Rossi-Forel scale, were as follows : 



VI. March 30, Argentine Republic; March 30, April 11, July 

 23, California. 



VII. February 8, Mexico; July 31, California. 



IX. October 11, Nicaragua ; December 18, Guatemala. 



The last two were the only ones in which serious injury to 

 buildings or loss of life was reported. 



So large a proportion of the earthquakes of the year have 

 occurred in California, that I have added (p. 12) an earthquake 

 map of that State for 1885, from which it will be seen that 

 the bay of San Francisco is situated in a particularly shaky 

 region. The greater number of earthquakes which are re- 

 ported here may be in part due to the better facilities for col- 

 lecting data, as this is the most thickly settled part of the 

 State, but it can hardly be attributed to that cause alone. 

 Upon the map the area of each earthquake is enclosed by a 

 line upon some part of which the date is given. The black 

 dots represent shocks which were reported from one place only. 

 At Sacramento this occurred twice in the year. The map will 

 also show what parts of the State were shaken more than once ; 

 thus San Francisco and San Rafael were within the areas of 

 five distinct earthquakes. 



I append a list of earthquakes in 1883 and 1884, which have 



come to my knowledge since the reports for those years were 



printed. None of them call for special comment. 



Am. Jour. Sci.— Third Series, Vol. XXXII, No. 187.— July, 188n. 

 2 



