BONINNE (BE)
Known mine explosion22 August 2012
- Magnitude
- 1.3ML
- Depth
- 1.0km ± 18.2
- Belgian time
- 13:54:142012-08-22
- UTC
- 11:54:142012-08-22
Main parameters
| Date and time | 2012-08-22 11:54:14 UTC 2012-08-22 13:54:14 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.487° N, 4.916° E Uncertainty ± 7.3 km |
| Depth of hypocenter | 1.0 ± 18.2 km |
| Event ID | ROB 4767 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2012-08-22 17:27:00 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
- 8
- Epicentral distance
- 16.6 – 78.7km
- Mean velocity, P wave
- 6.9km/s
- Mean velocity, S wave
- 4.2km/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 1.0 km. P wave: 7 measurements, root-mean-square deviation 0.99 s. S wave: 4 measurements, root-mean-square deviation 2.18 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)8 stations | ||||||
| GESGesves | 16.6 | 133 | 11:54:17.20+2.75 s | – | – | – |
| MRDMaredsous | 23.1 | 207 | 11:54:19.43+4.98 s | 11:54:23.43+8.98 s | 4.00 | – |
| CLAClavier | 28.4 | 105 | 11:54:19.11+4.66 s | 11:54:22.67+8.22 s | 3.56 | 18.1 |
| RCHRochefort | 43.1 | 149 | 11:54:22.15+7.70 s | 11:54:28.26+13.81 s | 6.11 | – |
| DOUDourbes | 49.2 | 208 | – | 11:54:24.42+9.97 s | – | – |
| RQRRonquières | 50.7 | 285 | 11:54:21.32+6.87 s | – | – | – |
| SKQSteenkerque | 61.9 | 287 | 11:54:25.94+11.49 s | – | – | – |
| MEMSMembach | 78.7 | 80 | 11:54:27.84+13.39 s | – | – | – |