TOURNAI (BE)
Known mine explosion20 March 2014
- Magnitude
- 1.9ML
- Depth
- 1.6km ± 26.4
- Belgian time
- 12:45:582014-03-20
- UTC
- 11:45:582014-03-20
Main parameters
| Date and time | 2014-03-20 11:45:58 UTC 2014-03-20 12:45:58 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.605° N, 3.377° E Uncertainty ± 13.4 km |
| Depth of hypocenter | 1.6 ± 26.4 km |
| Event ID | ROB 5079 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2014-03-20 14:33:34 Belgian time
Location map
- Epicentre
- Station that recorded the event
Arrival times at the stations
Each station first records the P wave, the fastest, then the S wave. The farther a station is from the epicentre, the later the waves reach it and the wider the gap between the two.
- Stations
- 9
- Epicentral distance
- 35.0 – 140.7km
- Mean velocity, P wave
- 5.5km/s
- Mean velocity, S wave
- 3.2km/s
- P wave
- S wave
- Curve fitted to the measurements
Notes and method
Curves: travel time of a direct wave in a homogeneous medium. The velocity of each wave and an origin-time shift, common to both, are fitted to the measurements by least squares. Hypocenter at a depth of 1.6 km. P wave: 6 measurements, root-mean-square deviation 0.51 s. S wave: 4 measurements, root-mean-square deviation 0.96 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
Station measurements
P- and S-wave arrivals and ground displacement measured at each station. Click a column heading to change the order.
| km | ° | UTC | UTC | s | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)9 stations | ||||||
| LESLessines | 35.0 | 70 | 11:46:04.76+6.12 s | 11:46:09.30+10.66 s | 4.54 | – |
| BOUBougnies | 46.9 | 121 | 11:46:05.27+6.63 s | – | – | – |
| SKQSteenkerque | 49.9 | 84 | 11:46:06.95+8.31 s | 11:46:12.49+13.85 s | 5.54 | – |
| SNFSeneffe | 65.1 | 99 | 11:46:09.71+11.07 s | – | – | – |
| DOUDourbes | 103.6 | 123 | 11:46:16.81+18.17 s | 11:46:29.18+30.54 s | 12.37 | 16.0 |
| MRDMaredsous | 104.3 | 108 | 11:46:16.51+17.87 s | 11:46:31.67+33.03 s | 15.16 | – |
| GESGesves | 123.7 | 101 | 11:46:19.81+21.17 s | 11:46:34.12+35.48 s | 14.31 | 25.3 |
| CLAClavier | 138.1 | 98 | 11:46:22.99+24.35 s | – | – | – |
| RCHRochefort | 140.7 | 110 | 11:46:23.29+24.65 s | – | – | – |