Era
Cretaceous
83
Quaternary
45
Cenozoic
38
Paleozoic
31
Tertiary
31
Holocene
24
Pliocene
23
Mesozoic
20
Miocene
18
Precambrian
16
Jurassic
14
Pleistocene
13
Permian
12
Proterozoic
11
Eocene
9
Mississippian
8
Paleocene
8
Paleogene
8
Neogene
7
Oligocene
7
Pennsylvanian
7
Ordovician
5
Triassic
5
21st century
4
Devonian
4
Silurian
4
Carboniferous
3
Archaean
2
Cambrian
2
Earthquake, 1987
2
1743-1826
1
1878-1974
1
1881-1971
1
1882-1966
1
Earthquake, 1984
1
Earthquake, 1989
1