DISTUKBANCES IN THE OCEAN. 



169 



instances, however, this observation may be due to the 

 slow and more gentle phenomena of the previous drawing 

 out of the water, which in a steep waste, or when the water 

 is rough, would be difficult to observe, not having been 

 remarked. 



The distance to which these sea waves have extended 

 has usually been exceedingly great. 



Fig. 28. — Record of Tide Gauge at Port Point, San Francisco. Showing 

 Earthquake Waves of May 1877. 



The sea wave of the Iquique earthquake of May 9, 

 1877, like many of its predecessors, was felt across the 

 basin of the whole Pacific, from New Zealand in the south, 

 to Japan and Kamschatka in the north. And but for the 

 intervention of the Eurasian and American continents 



