Table 1.
P, T, and B axes of average focal mechanisms and weighted average focal mechanisms (W) associated with T1, T2, and deep-SS related to sector1 = 1, sector2 = 2, sector3 = 3; aAverage focal mechanisms computed without considering the Ancona 1972 focal mechanisms.
| Average focal mechanisms | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P-trend (°) | P-plunge (°) | T-trend (°) | T-plunge (°) | B-trend (°) | B-plunge (°) | N° Tot | Depth-range (km) | Mmin | Mmax | N° (M < 4) | N° (M ≥ 4) | ||
| T1 | 1 | 214 | 9 | 11 | 80 | 123 | 4 | 16 | 8–27 | 3.5 | 4.8 | 5 | 11 |
| 2 | 236 | 6 | 30 | 83 | 145 | 3 | 30 | 0–11 | 1.7 | 5.1 | 18 | 12 | |
| 2a | 227 | 12 | 85 | 76 | 319 | 9 | 24 | 0–11 | 1.7 | 5.1 | 18 | 6 | |
| 3 | 267 | 16 | 34 | 66 | 171 | 18 | 70 | 2–22 | 1.5 | 5.1 | 61 | 9 | |
| T2 | 1 | 52 | 13 | 243 | 77 | 143 | 2 | 13 | 22–58 | 1.7 | 5.2 | 6 | 7 |
| 2 | 74 | 12 | 289 | 75 | 166 | 8 | 29 | 21–56 | 1.4 | 4.4 | 28 | 1 | |
| 3 | 104 | 23 | 261 | 65 | 11 | 9 | 5 | 19–58 | 2.1 | 4.1 | 4 | 1 | |
| Deep-SS | SS | 349 | 24 | 80 | 1 | 172 | 66 | 12 | 22–47 | 2.1 | 4.8 | 9 | 3 |
| T1(W) | 1 | 214 | 9 | 11 | 81 | 123 | 4 | 16 | 8–27 | 3.5 | 4.8 | 5 | 11 |
| 2 | 64 | 17 | 305 | 59 | 163 | 26 | 30 | 0–11 | 1.7 | 5.1 | 18 | 12 | |
| 2a | 52 | 7 | 144 | 19 | 302 | 69 | 24 | 0–11 | 1.7 | 5.1 | 18 | 6 | |
| 3 | 269 | 8 | 42 | 78 | 178 | 9 | 70 | 2–22 | 1.5 | 5.1 | 61 | 9 | |
| T2(W) | 1 | 54 | 12 | 223 | 78 | 323 | 2 | 13 | 22–58 | 1.7 | 5.2 | 6 | 7 |
| 2 | 241 | 4 | 106 | 85 | 331 | 4 | 29 | 21–56 | 1.4 | 4.4 | 28 | 1 | |
| 3 | 31 | 8 | 277 | 70 | 124 | 19 | 5 | 19–58 | 2.1 | 4.1 | 4 | 1 | |
| Deep-SS(W) | SS | 332 | 28 | 66 | 6 | 168 | 61 | 12 | 22–47 | 2.1 | 4.8 | 9 | 3 |