Table 3 Results of the soil gas Rn concentrations (D_max) and strength (S_max) of the mid-eastern section of QLF from 2016 to 2021.

From: Spatial–temporal evolution of soil gas Rn before two Ms ≥ 5.0 earthquakes in the mid-eastern of the Qilian fault zone (QLF)

NO

Site

2016

2017

2018

2019

2020

2021

D_max

S_max

D_max

S_max

D_max

S_max

D_max

S_max

D_max

S_max

D_max

S_max

HT1

CGS

21

4.22

18

2.1

17

1.82

12

2.56

23

1.84

30

2.17

HT2

YLX

15

2.47

22

1.93

19

2.11

24

2.4

20

2.19

23

1.89

HT3

GJZ

9

2.2

21

2.09

16

1.62

15

1.74

24

2.18

23

1.48

HT4

SMC

13

2.25

29

2.09

26

2.28

26

2.29

22

1.74

25

1.82

HT5

QSZ

21

5.42

28

2.58

23

1.76

29

1.96

27

1.88

30

1.88

HT6

BDK

23

3.28

31

2.63

34

2.11

27

2.36

27

2.1

31

1.81

HT7

HC

36

3.5

40

2.18

26

1.77

34

2.25

26

1.76

31

1.95

HT8

MJZ

34

3.03

40

2.18

55

2.71

27

2.65

41

2.99

37

1.96

HT9

GJT

39

3.73

60

3.25

72

3.18

72

3.31

50

2.05

48

1.97

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