Table 2 Instrumental parameters and determination of M s at two stations Göttingen (GTT) and Uppsala (UPP) from the E and N components of horizontal Wiechert instruments: T 0 free period, α damping factor, V magnification, pol. polarization of the instrument, drum speed of the smoke-paper recorder, Δ epicentral distance, Az. back azimuth, B maximum amplitude on the original record, T period at maximum amplitude, M s surface-wave magnitude
From: The 1905 Chamonix earthquakes: active tectonics in the Mont Blanc and Aiguilles Rouges massifs
Station | Comp. | T0 s | α | V | pol. | Drum, mm/min | Δ km | Az. | B, mm | T | Ms | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | GTT | E | 15.3 | 0.46 | 180 | – | 14.9 | 653 | 18° | 13.5 | 10.0 | 5.5 |
2 | GTT | N | 15.7 | 0.46 | 200 | – | 14.9 | 653 | 18° | 3.6 | 9.3 | 4.9 |
3 | UPP | E | 9.4 | 0.38 | 187 | + | 14.5 | 1690 | 21° | 1.1 | 8.5 | 5.1 |
4 | UPP | N | 9.8 | 0.38 | 188 | + | 14.5 | 1690 | 21° | 0.7 | 7.8 | 4.9 |