238 EAETHQUAKES ON THE PACIFIC COAST 



" ' At sea, longitude 125° 50', latitude 40° 24'; 



" ' At sea, longitude 125° 20', latitude 40° — (as above).' 

 " A relief map of the ocean bed near Cape Mendocino, made by 

 Prof. George Davidson and Mr. Winston, shows the coast to be 

 very 'steep-to'; and it further shows two submarine mountains 

 in the neighborhood.^ The slipping of the earth at the junction 

 of the steep submarine cliff with the (comparatively) flat ocean 

 floor may very well be the cause of some of these disturb- 

 ances. It is also possible, at least, that they are connected with 

 the two submarine elevations mentioned. More observations are 

 needed to decide this question. It is a little remarkable that we 

 have reports of shocks felt at sea in this vicinity and none, or 

 few, at other points along the coast." (See Oct. 24, 1895.) 



1805. Marcb lO; San Missel Island. 



This is one of a chain of islands about 30 miles off the coast, near 

 Santa Barbara, Cal. On Alarch 17 newspapers published reports 

 of a disturbance on this island about March 8, by which the 

 shore in places was elevated 60 feet and other considerable 

 changes wrought. Another disturbance is reported about March 

 30, by which a small schooner was wrecked in the harbor at the 

 island. A third disturbance was reported in July on Flea Island, 

 an islet in the immediate neighborhood. Through the kindness 

 of Mr. J. J. Hollister, of Santa Barbara, we learn that there was 

 a large landslide on San Miguel Island. This fact was worked up 

 by a newspaper reporter into a very sensational article. 



Cordoba, Mexico: the peak of Orizaba is reported in press dis- 

 patches to be in a state of eruption after many centuries of 

 quiescence. 



1895. March 12; Mount Hamilton; 91i. 34m. 17s. p. m., Pacltlc 

 Htandard time. 



One short, sharp, vertical sliock. Eossi-Forel (V).— E. S. H. At 9h. 

 34m. 17s. p. m.. Pacific standard time (in sitting room on Mt. 

 Ptolemy), strong vertical shock, followed by two very quick 

 weak shocks. All three lasted less than Is. Absolutely no hori- 

 zontal component noted. Intensity of first shock IV or V. — W. 

 W. C. 9h. 34m. 17s. p. m., Pacific standard. One sharp shock 

 followed by one or two slight tremors. Doors and other objects 

 rattled in third story of brick dwelling. Eossi-Forel V. — C. D. P. 

 The duplex seismograph recorded several small vibi-ations with- 

 out any decided tendency as to direction; the displacement of the 

 earth being about % mm. 



1805. April 1; Eureka; 81i. 42m. a. m. 



A sharp shock. The vibrations were from southwest to northeast. 

 — Newspaper report. 



1 This map is reproduced in the present volume. 



