TOURNAI (BE)
Known mine explosion12 January 2015
- Magnitude
- 1.7ML
- Depth
- 7.9km ± 5.4
- Belgian time
- 14:50:272015-01-12
- UTC
- 13:50:272015-01-12
Main parameters
| Date and time | 2015-01-12 13:50:27 UTC 2015-01-12 14:50:27 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.639° N, 3.406° E Uncertainty ± 4.1 km |
| Depth of hypocenter | 7.9 ± 5.4 km |
| Event ID | ROB 5275 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2015-01-13 10:50:17 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
- 10
- Epicentral distance
- 31.9 – 136.6km
- Mean velocity, P wave
- 6.3km/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 7.9 km. P wave: 8 measurements, root-mean-square deviation 0.31 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)10 stations | ||||||
| LESLessines | 31.9 | 75 | 13:50:33.17+5.96 s | 13:50:36.87+9.66 s | 3.70 | – |
| BOUBougnies | 47.3 | 126 | 13:50:35.74+8.53 s | – | – | – |
| SKQSteenkerque | 47.7 | 88 | 13:50:35.27+8.06 s | – | – | – |
| BRQBracquegnies | 54.6 | 108 | 13:50:36.47+9.26 s | – | – | – |
| RQRRonquières | 58.1 | 93 | 13:50:36.77+9.56 s | – | – | – |
| SNFSeneffe | 63.8 | 103 | 13:50:37.57+10.36 s | – | – | – |
| MRDMaredsous | 103.7 | 111 | 13:50:44.79+17.58 s | 13:50:57.91+30.70 s | 13.12 | – |
| DOUDourbes | 104.0 | 125 | 13:50:44.08+16.87 s | 13:50:57.46+30.25 s | 13.38 | – |
| GESGesves | 122.5 | 103 | 13:50:47.85+20.64 s | – | – | – |
| CLAClavier | 136.6 | 100 | 13:50:50.19+22.98 s | 13:51:04.34+37.13 s | 14.15 | 10.3 |