Number i

Date ${\text{t}}_{\text{i}}$ of the more strongest earthquake of the Earth

Region of the more strongest earthquake of the Earth

Real magnitude ${\text{M}}_{\text{i}}$

Calculated magnitude ${\text{M}}_{\text{i}}\text{(th)}$

$\Delta {\text{M}}_{\text{i}}$

${\text{x}}_{\text{i}}$ , in days

${\text{y}}_{\text{i}}$ , in days

${\text{z}}_{\text{i}}$ , in days

${\text{w}}_{\text{i}}$

Date ${\text{t}}_{\text{i}}\text{(M)}$

1

March 28, 1964

Southern Alaska

9.2

9.2 − 1.7 × 10⁻¹⁴

−1.7 × 10⁻¹⁴

−15.48

26.48

15.48

331.6562

March 28, 1964

2

May 26, 1975

Azores-Cape St. Vincent Ridge

7.9

7.9 + 4.5 × 10⁻¹⁵

4.5 × 10⁻¹⁵

48.61

21.39

− 47.61

−90.9267

May 25, 1975

3

March 6, 1988

Gulf of Alaska

7.8

7.8 + 2.3 × 10⁻¹⁵

2.3 × 10⁻¹⁵

−37.48

26.48

40.48

−158.6773

March 3, 1988

4

March 11, 2011

near the east coast of Honshu, Japan

9.0

9.0 + 7.3 × 10⁻¹⁵

7.3 × 10⁻¹⁵

−27.39

21.39

19.39

−254.1981

March 19, 2011

March 16, 2023

Kermadec Islands region

7.0

7.69

0.69

−22.39

21.39

31.39

550.5151

March 7, 2023