30 C. G. Rockwood—Recent American Earthquakes. 
seconds, and accompanied by a rumbling noise. The shocks 2 
“were not sharp or sudden, but coming on rather slowly, swell- 
ing in force, and then quickly dying out.” The direction of the 
vibration was north and south, and it was sufficiently strong to 
knock down plastering, ete. It was felt toward the north as 
far as Washington and Baltimore, and toward the northwest at 
Staunton and Gordonsville, at which latter place the a hes : 
e a 
stated at 11.30, and the duration “fully three seconds.” 
U. 8. Signal Service reports: “Two shocks at 11.30 at Fortress 
Monroe, Va.; about 11.30 at New Market, Ind.; shock lasting 
twenty seconds at 11.45 at Greensboro, N. C.; ; two shocks saa 
east-southeast to north-northwest, the first lasting five or s 
seconds, the second not quite so heavy at. 11.40 ‘Wiashinebod 
time) at Alto Vista, Va.; two shocks from east to west, ‘first 
lasting ten or fifteen seconds, the second milder, at 11.33 at 
Petersburg, Va.; shock from northeast to southwest with rush- 
ing roaring noise at Weldon 
gn IES RT os Be tare LE 
Dec. 23.—A shock at night in 1 Placer, Nevada and Yuba ~ 
Counties, Cal. 
Dec. 24.—A shock in the evening at Grass Valley, Cal. (N. 
Y. Times.) 
1876. 
Jan. 7.—Three shocks at the Island of St. Thomas, W. L., 
the morning, “the first at about four o'clock, the second “ 
about half past four, which was very severe, and the last three 
minutes later.” (Newark pa Advertiser. 
Jan. 7.—A shock at 2.20 Pp. m. at Warner and Contoocook- 
ville, N. H. Its apparent hues was from west to east and its 
duration two minutes. . 
Jan. 8.—A shock at 4.30 Pp. mM. at Lockport, N. Y. (U.S. 
Sign. Serv.) 
Jan. 15.—A severe shock at midnight at China, Me. 
Jan. a1 —A shock between 3 and 4 a. M. at San José, Santa 
Cruz and San Francisco, Cal. (U.S. Sign. Ser) 
Jan. 27.—Two shocks - Ascoineet Mich. (U. wads 
Jan. 29.—A shock at 9.05 Pp. mM. at a Ata. (U. 8. 
rv. 
feb. 7.—A shock in the City of Mexico. (U. 8S. Sign. oe) 
Feb. 27.—A shock at Detroit, Mich. 
March = —— slight shocks at 6 a. Mm. and 1 p. mw. at Oakland, 
Cal. (U.S. Sign. Serv.) 
April 10. —A shock was felt in a large portion of St. sie 
County, Md., attended by a rumbling sound. (N. Y. Times.) 
New Druamehic N. J., May 3, 1876. 
