ACADEMY OF NATURAL SCIENCES. 147 



hence, the presumption is, that subterranean action has not been violent in those 



distant regions during the year just passed. 



On the coast of Mexico, and inclusive between the twenty-fifth and thirty- 

 second parallels, we have received intelligence of the occurrence of one earth- 

 quake, which appears to have been felt on both shores of the Gulf of California 



for a distance of nearly two hundred miles, both north and south. We have no 



records south of that point. 



The shocks which we can authenticate within the limits of our own State. 



are as follows : 



January 9th. — This shock was felt from Sacramento to the southern boundary 

 of the State. It was preceded by three smart shocks the night and morning 

 previous. At Santa Barbara water was thrown over the surface from a shoal 

 well, seven feet deep, the water in which was less than three feet in depth. 



January 18th, 9h. — A light shock at Martinez and Benicia. 



January 20th, 8h. 30m. — A smart shock was felt at Santa Cruz and Mission 

 San Juan. 



January 21st, 23h.- — On the evening of this day a smart shock was felt at Mari- 

 posa. The wave and sound seemed to travel from north-west to south-east. 

 It was accompanied with a report like that of a distant gun. 



February 5th, 7h. — A smart shock was felt in San Francisco, which shook the 

 buildings that are situated on made-ground very severely, while those sit- 

 uated on firmer bottoms were affected. This shock was felt at Oakland and 

 Stockton, but was not felt at San Jose or Sacramento, as reported at the 

 time. 



March 14th, 15h. — A severe shock was felt at Santa Barbara and Montecito. 

 It was momentary in duration, attended with a loud report. 



March 23d, 12h. 27m. — A light shock in San Francisco. 



May 3d, 22h. — A smart shock at Los Angeles and the Monte. 



May 23d. — A light shock at Los Angeles ; a report also that a severe shock 

 had been felt at Fort Tejon. 



June 14th. — A shock was felt at Humboldt Bay. On the same day several 

 severe shocks were experienced at the Penal Island (Carmen), Gulf of Cali- 

 fornia, and which extended almost ninety miles north and south of the island. 



August 8th, lib. — A smart shock was felt at Rabbit Creek, Sierra County. 



August 29. — A severe shock at the Tejon Reserve. No time is given. 



September 2d, 19h. 45m. — A light shock at San Francisco. This shock was 

 felt at Sacramento, Marysville, Nevada, San Juan, Downieville, and Camp- 

 tonville. 



September 14th, 2 p.m. — A light shock in San Francisco. 



October 19th, 18h. 30m. — A severe shock of an earthquake in San Francisco. 



October 20th, 12h. 8m., 12h. 35m., and 13h. 15m. — Three other shocks occurred ; 

 the last was equally severe with that of January 9th, at 8 a.m. People were 

 much frightened, and left their beds. The shock was felt at San Jose, but 

 not at Oakland. 



November 8th, 8h. 45m. — A shock at San Francisco, which was felt at Oak- 

 land and Bodega. 



