NAMUR (BE)
Known mine explosion13 March 2012
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:56:272012-03-13
- UTC
- 12:56:272012-03-13
Main parameters
| Date and time | 2012-03-13 12:56:27 UTC 2012-03-13 13:56:27 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.484° N, 4.930° E Uncertainty ± 3.4 km |
| Event ID | ROB 4682 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2012-03-13 20:52:15 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
- 15.7 – 77.8km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.7km/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: 9 measurements, root-mean-square deviation 0.58 s. S wave: 4 measurements, root-mean-square deviation 0.35 s.
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)9 stations | |||||
| GESGesves | 15.7 | 135 | 12:56:29.98+2.31 s | 12:56:32.02+4.35 s | 2.04 |
| MRDMaredsous | 23.3 | 210 | 12:56:32.49+4.82 s | 12:56:34.77+7.10 s | 2.28 |
| CLAClavier | 27.4 | 105 | 12:56:31.93+4.26 s | 12:56:35.02+7.35 s | 3.09 |
| RCHRochefort | 42.3 | 150 | 12:56:34.63+6.96 s | – | – |
| DOUDourbes | 49.4 | 209 | 12:56:35.87+8.20 s | 12:56:41.11+13.44 s | 5.24 |
| LCHLa Chartreuse | 50.4 | 70 | 12:56:37.67+10.00 s | – | – |
| RQRRonquières | 51.8 | 285 | 12:56:36.33+8.66 s | – | – |
| MEMHMembach | 77.8 | 79 | 12:56:41.01+13.34 s | – | – |
| MEMSMembach | 77.8 | 79 | 12:56:41.05+13.38 s | – | – |