half, the motion there being undulatory, but at Acapulco trepidatory.
On March 13th, 1834, another shock is recorded; the sea receded fifty varas, and several buildings were destroyed.
On the 6th of January, 1835, at six in the morning, a very severe earthquake was felt, lasting upwards of two minutes; motion trepidatory, the shocks recurring every thirty hours for upwards of a month. This, like that of 1833, was felt in Mexico.
On the 9th of August, 1837, a heavy shock was felt, trepidatory, recurring at thirty hours for nearly three weeks. It was felt slightly at Mexico.
On the 18th of October, 1837, at four p. m. a heavy earthquake occurred, which lasted until the 22nd. During this interval of four days the earth trembled continuously; one hundred separate shocks were counted between four p. m. 18th, and ten p. m. 22nd. During this interval five very severe shocks occurred, four p.m. 18th, ten p. m. 19th, midnight 19th, four p. m. 20th, four p. m. 21st. That at midnight on the 21st was terrific; had it lasted a few seconds longer, rocks would undoubtedly have been rent asunder. Following this earthquake, for six weeks continuously, periodical heavy shocks were experienced, at ten a. m., ten and twelve p. m., and at dawn. At Mexico the shocks were severely felt at the same instants, on the 18th and 19th.
In conclusion, daily "temblors" have occurred since
