Table 1 Major source parameters of earthquake doublet

Seismic moment (M₀)

Nm

8.27 × 10²⁰

4.19 × 10²⁰

Moment magnitude (M_W)

-

7.88

7.68

Mean slip (D)

m

2.69

3.42

Fault area (Σ, with D > 1 m)

m²

1.06 × 10¹⁰

4.45 × 10⁹

Rupture velocity (v_rup)

km/s

2.90

4.50

Static stress drop (Δσ_s)⁵⁴

MPa

14.66

19.09

Corner frequency (f_c)

Hz

6.24 × 10^-3

2.40 × 10^-2

Spectral decay exponent (n)

-

1.10

1.72

Radiated energy (E_R)

J

9.20 × 10¹⁶

1.90 × 10¹⁶

Energy magnitude (M_e)

-

8.41

7.95

Energy-moment ratio (ẽ)

-

1.11 × 10^-4

4.53 × 10^-5

Apparent stress drop (Δσ_a)

MPa

3.75

1.53

Radiated energy enhancement factor (REEF)¹⁰¹

-

317.60

17.87

Radiation efficiency (η_r)

-

0.51

0.16