| No. |
Date. |
Intensity. |
Epicenter and effects. |
| |
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. |
| 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. |