|
Year |
Location |
Magnitude |
Comment |
|
1937 |
Western Ohio
|
5.4 |
The largest historical earthquake in Ohio.
An earthquake stronger than the shock on March 2
centered near Anna in Shelby County. The three-story
schoolhouse at Anna was cracked severely, and the
churches that were damaged in the March 2 shock were
further damaged. Almost every chimney was broken or
twisted, and house foundations and walls were cracked.
A few chimneys fell at Sidney, about 12 kilometers south of
Anna, and plaster was damaged.
Subsurface changes
caused by the two earthquakes included renewed activity
of springs, conversion of ordinary wells to artesian
wells, and an increase in the flow of other water wells;
the output of both oil and gas wells was reduced. A
spring at Huntsville (Logan County), dry for 8 years,
began "spouting water" after the second shock, and the
flow of artesian wells was increased at New Knoxville
(about 45 kilometers west of Huntsville).
|
|
1957 |
Andreanof Islands, Alaska
|
8.6 |
One of the Largest Earthquakes in the World
and
one of the Largest Earthquakes in the United States.
|
|
1957 |
Fox Islands, Alaska
|
7.1 |
One of the Largest Earthquakes in the United States.
|
|
|