Year i

Date ${\text{t}}_{\text{e}}\text{(i},\text{loc}\text{.max}\text{.)}$ of the strongest

Chinese earthquake,

in yr

Magnitude ${\text{M}}_{\text{up}}\text{(i},\text{loc}\text{.max}\text{.)}$ of the

strongest Chinese

earthquake

Region of the strongest continental

Chinese

earthquake

${\text{t}}^{\ast }{\text{(τ}}_{\text{c,r}},\text{i)}$ ,

in yr

$\Delta (\text{i})$ ,

in days

$\text{φ(i})$ ,

$\sin \text{φ(i})$

${\Delta }_{\text{g,S,P}}\text{(i})$

$\begin{array}{l}{\Delta }_{\text{g,S,P}}\text{(i})\times \\ \sin \text{φ(i})\end{array}$

1927 AD

1927-05-22

=

1927.38877481

7.7

Gansu-Qinghai border region, China

${\text{t}}^{\ast }{\text{(τ}}_{\text{c,r}},\text{1927)}$

= 1927.1333333 AD

93.3 days after the date

${\text{t}}^{\ast }{\text{(τ}}_{\text{c,r}},\text{1927)}$

64.67˚,

0.9038709

4232.316

3825.4679

1924 AD

1924-10-08

=

1924.77207392

6.5

western Xizang

${\text{t}}^{\ast }{\text{(τ}}_{\text{c,r}}\text{,1924)}$

= 1924.9666666 AD

71.07 days before the date ${\text{t}}^{\ast }{\text{(τ}}_{\text{c,r}},\text{1924)}$

35.39˚,

0.5791401

4831.5685

2798.155

1908 AD

1908-08-20

=

1908.63791923

6.9

western Xizang

${\text{t}}^{\ast }{\text{(τ}}_{\text{c,r}}\text{,1908)}$

= 1908.5833333 AD

19.93 days after the date ${\text{t}}^{\ast }{\text{(τ}}_{\text{c,r}},\text{1908)}$

55.60˚,

0.825117

3875.951

3198.1133