MARCHE-LES-DAMES (BE)
Known mine explosion16 March 2012
- Magnitude
- –
- Depth
- –
- Belgian time
- 11:44:112012-03-16
- UTC
- 10:44:112012-03-16
Main parameters
| Date and time | 2012-03-16 10:44:11 UTC 2012-03-16 11:44:11 Belgian time |
|---|---|
| Magnitude | – |
| Epicentral coordinates | 50.495° N, 4.983° E Uncertainty ± 3.9 km |
| Event ID | ROB 4688 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2012-04-27 16:36:39 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
- 14.3 – 55.1km
- Mean velocity, P wave
- 5.8km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 6 measurements, root-mean-square deviation 0.55 s. S wave: 4 measurements, root-mean-square deviation 0.47 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)6 stations | |||||
| GESGesves | 14.3 | 149 | 10:44:13.79+2.49 s | 10:44:14.98+3.68 s | 1.19 |
| CLAClavier | 24.2 | 110 | 10:44:15.86+4.56 s | 10:44:19.31+8.01 s | 3.45 |
| MRDMaredsous | 26.4 | 215 | 10:44:16.03+4.73 s | 10:44:19.45+8.15 s | 3.42 |
| RCHRochefort | 41.7 | 155 | 10:44:18.60+7.30 s | – | – |
| DOUDourbes | 52.4 | 212 | 10:44:21.07+9.77 s | 10:44:27.57+16.27 s | 6.50 |
| RQRRonquières | 55.1 | 283 | 10:44:19.73+8.43 s | – | – |