342 



L. MARTIN — ^ALASKAN EARTHQUAKES OF 1899 



Argentina, India, Japan, Java, Mauritins, and South Africa (figure 6) 

 recorded these shocks, several of which equalled, and one (September 10) 

 far surpassed, the 1906 California earthquake in duration and amplitude. 

 In this wilderness portion of Alaska there was no serious property dam- 

 age and no recorded loss of life. 



Figure 1. — Areas shaken 62/ five great Earthquakes in North America 



Several earthquakes in Jamaica, Mexico, and New England not shown. Maximum 

 areas of New Madrid, Sonora, and Yakutat Bay earthquakes probably much greater, 

 but extreme observations of weak shocks not obtainable in wilderness areas surrounding 

 these three epicentra, as was done for Charleston and California. Minimum area of 

 Yakutat Bay shock of September 10, 1899, shown. 



The phenomena accompanying the shocks were observed at distances 

 of 5 to 730 miles, and perhaps raised water waves on Lake Chelan, in 

 Washington, over 1,200 miles away. The minimum land area shaken 

 was 216,300 square miles (figure 1), the land and water area being 



