region

Sichuan

Qinghai

Gansu

Ningxia

Inner Mongolia

Shanxi (SN)

Shaanxi (SX)

Henan

Shandong

Disaster grade

2

1

2

1

2

2

1

2

2

r ¯ i

0.65

0.88

0.75

0.85

0.72

0.76

0.82

0.67

0.69