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Table 4 Two-tensile-crack model (2006–2009)

From: Preparatory process preceding the 2014 eruption of Mount Ontake volcano, Japan: insights from precise leveling measurements

  

Bound interval

Grid interval

Optimal value

Errors

Lower

Upper

Shallow tensile crack

Opening (m)

   

0.6

−1.9/+2.1

Volume (m3)

   

0.9 × 106

−2.9 × 106/+3.2 × 106

Deep tensile crack

Latitude (degree)

35.8689

35.9049

0.0045

35.8869

−0.0126/+0.0293

Longitude (degree)

137.4735

137.4847

0.0056

137.4791

−0.0121/+0.0362

Length (m)

1000

5000

500

2000

−400/+600

Strike (degree)

120

180

1

155

−9/+28

Width (m)

500

8000

500

4500

−800/+1500

Depth (m)

2000

10,000

500

3000

−1300/+5000

Dip (degree)

0

−90

1

−70

−10/+29

Opening (m)

   

0.7

−0.2/+1.0

Volume (m3)

   

6.3 × 106

−1.7 × 106/+9.4 × 106