354 CO. G. Rockwood—American Earthquakes. 
1881. 
Jan. 23.—5.30 a.m. A moderate shock at Guatemala; reported 
also (5.55 a. M.) at San José de Costa Rica. 
Mar. 3. During the night of the 2d and 3d on slight oe 
were felt at San Marcos, a town northwest from Guatem 
Mar. 7.—7.52 A.M. A slight shock, _ lasting -ehies ceobud ae 
ported fous Dos Caminos, Mexic 
Mar. 15.—1.50 p.m. A moderate shoud lasting four seconds at 
the same 
Mar. 29. A moderate shock (N. to oun ye from Oaxaca 
(12.50 p. m.), and Tlacolula (12,55 
Mar. eee Slight shocks reported at Villa ree Ixtlan (12.55 
u., N ., 5 se mo 8 and at San Carlos Yautepec (1.30 
p. m., E. to W., 4 to 6 seconds. 
The baat four dddenk are by E. R., from a Mexican paper. 
April oe oe Ape shock reported from San Salvador, Central 
= se ig) to ae More than fifteen moderate shocks, all vertical, 
reported from San Salvador during these six 8. 
April 27.—10.20 A. m. and 11.30 a. m., moderate shocks at Guate- 
mala. 
April 28.. At 9 p. mM. a violent shock with vertical movement, 
lasting more than fifty seconds, did some damage at Mana- 
gua, in western Nicaragua, — was followed by other shocks 
at 10.00, 11.00 and 11.30 Pp The first shock was also re- 
ported as very heavy at eg Juan del Sur and Chinandega, 
and was oe at various eee between these places. 
May 13.—5.30 A slight shock, 8S. to N., duration three 
seconds, at ean Carlos Vuikeke, Mexico. 
May 27.—12.15 p.m. A slight shock, duration three seconds, at 
ag Pn Villa Juarez Ixtlan, and San Carlos Yautepec (S. 10 
N.), Mexico, and also at San “Cristobal las Casas (1 P. M., 
to 
May 29.—1.40 P.M. A eh shock at Guatemala. 
Aug. 13.—12.30 Pp. wm. A strong earthquake at San Marcos, Gua 
temala; — also — at the capital city. 
Sept. 25.—4.20 p.m. An earthquake of about two seconds’ dura 
tion at San ‘Cristobal ii Casas, (Chiapas) Mexico. 
Oct. 3.—9.30 Pp. mM. A slight shock at Acaponeta, ses 
Oct. 17. At 12.50 a. «. a shock of two seconds’ duration at Do 
Caminos, Mexico. At 1.55 P.M. a strong shock, "duration 
three —— at Chilpancingo. 
Also at Mexcala, hour not given, a strong shock of two 
seconds’ piaceseee probably coincident with that last mem 
tioned. 
