Chapter III: Part 3

APPENDIX.

EARTHQUAKES IN THE MARIANAS ISLANDS.

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No. | Date. |Intensity.
| | | Epicenter and effects.
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| _Y. M. d. h. m._ | |
1 |1825 IV -- -- -- |VIII |Destructive earthquake in the Marinas or
| | |Ladrones group of islands. Ruined many
| | |buildings at Agaña, Guam Island.
| | |
2 |1834 V -- -- -- |VIII |Destructive earthquake on Guam Island.
| | |Considerable havoc and great panic at
| | |Agaña and in the other towns of the
| | |island.
| | |
3 |1849 I 25 14 56 | IX |Destructive 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.
| | |
4 |1862 VII 1 7 48 | VII |Violent earthquake. Did great damage to
| | |the tile roofs at Agaña and in other towns
| | |on the Island of Guam.
| | |
5 |1863 XII 7 3 -- | VI |Guam. Violent earthquake causing great
| | |alarm but little harm.
| | |
6 |1866 VI 24 13 -- | VI |Guam. Very strong earthquake.
| | |
7 |1870 V 13 15 27 | VI |Guam. 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.
| | |
8 |1892 V 16 21 10 |VIII |Destructive 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.
| | |
9 |1902 IX 22 11 15 | IX |Destructive 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.
| | |
10 |1902 XII 24 7 15 | VI |Very strong earthquake lasting over a
| | |minute. At this time the aftershocks of
| | |the earthquake of September 22 were still
| | |continuing.
| | |
11 |1903 II 10 12 39 | VII |Guam. 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.
| | |
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No. | Date. |Intensity.
| | | Epicenter and effects.
----+--------------------+-----+------------------------------------------
| _Y. M. d. h. m._ | |
12 |1909 XII 10 9 0 |VIII |Guam. 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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| Typographical errors corrected in text: |
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| Page 10: Iloílo replaced with Iloilo |
| Page 11: Iloílo replaced with Iloilo |
| Page 21: damage replaced with damaged |
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