No.Date.Intensity.Epicenter and effects.Y.M.d.h.m.11825IV———VIIIDestructive earthquake in the Marinas or Ladrones group of islands. Ruined many buildings at Agaña, Guam Island.21834V———VIIIDestructive earthquake on Guam Island. Considerable havoc and great panic at Agaña and in the other towns of the island.31849I251456IXDestructive earthquake. Laid in ruins all the masonry buildings on the islands—the church,convento, and college at Agaña, the churches at Umata, Pago, and Agat, together with a great number of houses. Immense fissures opened in many places, and an extraordinary commotion of short duration was observed in the sea. There followed countless aftershocks, some of them very intense; from January 25 to March 11 no fewer than 150 were actually counted.41862VII1748VIIViolent earthquake. Did great damage to the tile roofs at Agaña and in other towns on the Island of Guam.51863XII73—VIGuam. Violent earthquake causing great alarm but little harm.61866VI2413—VIGuam. Very strong earthquake.71870V131527VIGuam. Two very strong shocks at an interval of 10 seconds. The fact that they did no damage has been attributed to the absence of horizontal movements.81892V162110VIIIDestructive earthquake which severely damaged the masonry buildings in Agaña and other towns, produced many fissures and displacements on the coasts and in other places. The sea retired suddenly, but no devastating alternations of floods and ebbs followed. The few aftershocks which occurred during the two following days were feeble.91902IX221115IXDestructive earthquake which wrecked or damaged very seriously all the buildings at Agaña, Guam. Great fissures opened in the ground and displacements occurred which resulted in the destruction of several bridges. Similar effects are reported from Saipan Island. Personal accidents were limited to a few injured. Aftershocks were very numerous during the first days after the earthquake.101902XII24715VIVery strong earthquake lasting over a minute. At this time the aftershocks of the earthquake of September 22 were still continuing.111903II101239VIIGuam. Violent earthquake which damaged to some extent the government house at Agaña. Two distinct series of shocks were observed, having a total duration of more than a minute.No.Date.Intensity.Epicenter and effects.Y.M.d.h.m.121909XII1090VIIIGuam. Destructive earthquake. Two shocks lasting 20 seconds, of which the second was the more severe. Direction of the shocks SE-NW. In Agaña practically all the east and west walls of native mortar houses were badly cracked. In nearly every house articles on shelves of these walls were thrown down, while those on the north and south sides remained in place. The women's hospital, built of local mortar, was so badly injured as to require tearing down; its tiled roof slid off to westward and the worst cracks were in the east wall. Many ceiling boards in different houses were shaken down. Several fissures opened in the ground, from one of which, near the river, came a large flow of water. The river bed sank in several places. The passing wave could be seen distinctly as it crossed the plaza, and the station ship in the harbor reported having felt the shock. No damage of importance was done in the other towns on the island. The buildings of the cable station at Sumay, constructed of reinforced concrete, were not injured, but a few objects were thrown down and the steel water towers could be seen swaying. No shocks were noticed before or after the earthquake, nor was anything extraordinary observed in the sea. The disturbance was not felt at Yap, Western Carolines. No information from the other islands.
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