Table 1 Search range and step for the model parameters and their optimal values and uncertainties (square brackets) for each period
From: Tilt and strain change during the explosion at Minami-dake, Sakurajima, on November 13, 2017
Search | Optimal and fixed values for each source parameter and their uncertainties | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Parameter | Range | Step | Phase 1 | Phase 2 | |||||||
Single spherical source | Dual spherical sources (except data of KMT) | Three spherical sources model | Dual spherical sources with tensile fault model | ||||||||
Source MS | Source MS | Source MD | Source MS | Source MD | Source K | Source MS | Source MD | Tensile fault | |||
E–W location (km) | − 10.0 to 10.0 | 0.1 | 0.3 [0.2, 0.4] | 0.3 (Fixed) | − 1.1 [− 2.5, 0.2] | 0.3 (Fixed) | − 1.1 (Fixed) | 1.9 [− 1.8, 3.0] | 0.3 (Fixed) | − 1.1 (Fixed) | 6.8 [6.5, 7.8] |
N–S location (km) | − 10.0 to 10.0 | 0.1 | − 0.3 [− 0.5, 0.0] | − 0.3 (Fixed) | 0.4 [− 0.4, 0.7] | − 0.3 (Fixed) | 0.4 (Fixed) | 4.2 [2.9, 6.3] | − 0.3 (Fixed) | 0.4 (Fixed) | 7.0 [0.9,10.0] |
Depth (km bsl) | 0.0 to 10.0 | 0.1 | 0.1 [0.1, 0.6] | 0.1 (Fixed) | 3.3 [2.6, 4.9] | 0.1 (Fixed) | 3.3 (Fixed) | 3.2 [2.6, 5.8] | 0.1 (Fixed) | 3.3 (Fixed) | 0.7 [0.6, 0.8] |
Radius (m) | 0.1 to 10.0 | 0.1 | 0.1 [0.1, 0.1] | 0.1 (Fixed) | 0.5 [0.1, 10.0] | 0.1 (Fixed) | 0.5 (Fixed) | 0.1 [0.1, 10.0] | 0.1 (Fixed) | 0.5 (Fixed) | – |
Length (m) | 0.1 to 10.0 | 0.1 | - | – | – | – | – | – | – | – | 4.7 [0.6, 8.4] |
Width (m) | 0.1 to 10.0 | 0.1 | - | – | – | – | – | – | – | – | 0.4 [0.1, 0.9] |
Dip (degree) | 0–90 | 1 | – | – | – | - | – | – | – | – | 7 [6, 8] |
Strike (degree) | − 179–180 | 1 | – | – | – | – | – | – | – | – | 2 [− 70, 13] |
Opening (m) | − 10 to 10 | 0.01 | - | - | - | – | – | – | – | – | 4.52 [0.46, 8.58] |
Volume change dV (m3) | − 200,000 to 200,000 | 100 m3 | − 1900 [− 2400, − 1400] | 2,600 [1,000, 4,200] | − 62,600 [− 105,700, − 20,500] | 2,800 [600, 5000] | − 62,400 [− 112,000, − 12,900] | − 26,500 [− 48,400, − 4600] | 2900 [300, 5,400] | − 64,000 [− 120,800, − 7200] | (8,497,600) |