TOURNAI (BE)
Known mine explosion14 March 2012
- Magnitude
- 2.2ML
- Depth
- –
- Belgian time
- 15:56:202012-03-14
- UTC
- 14:56:202012-03-14
Main parameters
| Date and time | 2012-03-14 14:56:20 UTC 2012-03-14 15:56:20 Belgian time |
|---|---|
| Magnitude | ML 2.2 |
| Epicentral coordinates | 50.579° N, 3.393° E Uncertainty ± 5.6 km |
| Event ID | ROB 4684 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2012-03-14 16:13:04 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
- 6
- Epicentral distance
- 44.5 – 163.3km
- Mean velocity, P wave
- 5.7km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 5 measurements, root-mean-square deviation 0.47 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)6 stations | |||||
| BOUBougnies | 44.5 | 118 | 14:56:27.95+7.21 s | 14:56:34.33+13.59 s | 6.38 |
| SKQSteenkerque | 49.2 | 81 | 14:56:27.74+7.00 s | 14:56:33.56+12.82 s | 5.82 |
| RQRRonquières | 59.0 | 87 | 14:56:29.32+8.58 s | 14:56:39.43+18.69 s | 10.11 |
| DOUDourbes | 101.1 | 122 | 14:56:37.64+16.90 s | – | – |
| MRDMaredsous | 102.4 | 107 | 14:56:37.17+16.43 s | – | – |
| EBNEben-Emael | 163.3 | 81 | 14:56:49.44+28.70 s | – | – |