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Table 3 Paleodirection results

From: Recent eruption history inferred from eruption ages of the two latest lava flows using multi-dating at Yokodake Volcano, Japan

Y8 lava

Paleodirections

Remark

Loc.

Sample

Dec (°)

Inc (°)

MAD (°)

T (°C)

Comp.

a

1

19.8

46.4

0.7

400–600

2

 

2

14.7

50.2

1.1

500–600

2

 

b

1

0.2

38.3

0.2

540–600

2

 

2

8.9

48.8

0.3

540–600

2

 

c

1

30.7

54.4

1.6

150–250

2

 

2

19.4

54.1

1.9

100–200

2

 

3

16.4

44.7

4.3

100–350

2

 

d

1

1.0

51.6

4.2

100–450

2

 

2

14.5

49.9

5.4

150–250

2

 

3

− 4.5

40.0

1.6

150–250

>3

 

4

− 15.6

40.7

7.9

100–300

2

 

5

8.9

55.6

5.4

100–400

2

 

6

0.0

56.6

7.8

100–300

2

 

e

1

− 8.3

58.9

0.6

400–620

2

 

2

− 8.1

54.2

0.3

500–620

2

 

3

− 7.9

51.6

0.3

500–620

2

 

f

1

11.6

52.0

2.0

150–600

1

 

2

− 6.5

55.1

2.2

350–600

2

 

3

12.8

45.1

3.6

200–300

2

 

4

18.0

20.7

1.1

100–600

1

*

5

− 4.0

51.8

1.4

150–600

1

 

Mean

n/N

Dec (°)

Inc (°)

α95 (°)

k

  

1

21/21

6.0

49.3

4.6

48.4

  

2

20/21

5.1

50.6

3.9

70.0

  

Y9 lava

Paleodirections

Remark

Loc.

Sample

Dec (°)

Inc (°)

MAD (°)

T (°C)

Comp.

a

1

19.6

47.4

5.8

100–400

2

 

2

− 6.8

49.9

4.8

200–300

2

 

3

19.0

44.4

7.6

200–400

2

 

b

1

13.1

39.9

5.8

150–250

2

 

2

8.3

21.0

6.3

150–250

2

*

3

10.1

40.1

8.2

100–200

2

 

c

1

18.1

49.2

2.7

150–250

2

 

2

11.5

59.9

9.1

100–350

2

 

d

1

1.8

56.9

8.3

300–400

2

 

2

1.5

54.8

7.4

350–450

2

 

3

4.1

56.0

2.9

100–200

2

 

e

1

− 29.3

64.4

9.8

100–250

2

*

2

31.2

61.6

9.2

100–200

> 3

 

3

45.9

16.6

4.6

100–400

2

*

f

1

21.2

54.2

2.2

100–400

2

 

2

18.9

58.6

3.0

100–450

> 3

 

3

− 11.8

47.7

7.9

100–300

2

 

g

1

− 1.0

55.6

2.4

520–580

2

 

2

5.6

58.6

0.3

520–580

2

 

h

1

− 7.9

54.4

3.4

100–300

> 3

 

i

1

0.1

52.2

3.2

300–450

2

 

2

11.3

62.3

2.6

300–450

2

 

3

3.7

52.9

7.9

150–450

2

 

j

1

5.3

55.5

7.1

100–400

2

 

2

7.2

50.9

5.8

150–250

2

 

3

4.0

47.0

8.1

100–250

2

 

4

0.9

48.7

4.6

250–350

2

 

k

1

1.2

39.5

1.0

400–600

2

 

2

8.8

54.3

1.7

400–600

2

 

3

5.7

50.6

0.9

500–600

2

 

4

0.5

56.5

0.4

450–600

2

 

5

3.1

53.2

0.3

450–600

2

 

6

0.4

51.2

1.0

450–600

2

 

l

1

10.3

49.6

0.9

100–580

1

 

2

4.5

52.4

4.2

200–400

2

 

3

2.4

54.3

4.5

250–450

2

 

4

− 0.1

49.9

4.7

300–400

2

 

5

2.5

51.6

5.4

250–350

2

 

Mean

n/N

Dec (°)

Inc(°)

α95(°)

k

  

1

38/38

7.1

51.4

3.5

43.9

  

2

35/38

6.1

52.4

2.3

109.8

  
  1. Dec, declination; Inc, inclination; MAD, maximum angular deviation; T, unblocking temperature range for the magnetic component from which paleodirection was obtained; Comp., number of magnetic components; *, rejected sample using the outlier test of McFadden (1982); N, total number of samples measured; n, number of samples used for calculation of the mean direction; α95, 95% confidence angle; k, precision parameter; Mean 1, overall mean direction; Mean 2, mean direction of the accepted samples