LA ROCHE-EN-ARDENNE (BE)
Known mine explosion22 July 2015
- Magnitude
- 1.8ML
- Depth
- 9.9km ± 3.6
- Belgian time
- 14:09:222015-07-22
- UTC
- 12:09:222015-07-22
Main parameters
| Date and time | 2015-07-22 12:09:22 UTC 2015-07-22 14:09:22 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.197° N, 5.588° E Uncertainty ± 0.9 km |
| Depth of hypocenter | 9.9 ± 3.6 km |
| Event ID | ROB 5386 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2015-07-23 07:25:13 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
- 16
- Epicentral distance
- 26.2 – 119.0km
- Mean velocity, P wave
- 6.1km/s
- Mean velocity, S wave
- 3.5km/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 9.9 km. P wave: 16 measurements, root-mean-square deviation 0.34 s. S wave: 9 measurements, root-mean-square deviation 0.50 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)16 stations | ||||||
| RCHRochefort | 26.2 | 260 | 12:09:26.80+4.60 s | 12:09:29.94+7.74 s | 3.14 | – |
| CLAClavier | 32.1 | 321 | 12:09:27.91+5.71 s | 12:09:32.13+9.93 s | 4.22 | 56.2 |
| HOUHouvegnez | 34.5 | 59 | 12:09:27.98+5.78 s | 12:09:31.76+9.56 s | 3.78 | – |
| GESGesves | 41.4 | 301 | 12:09:29.44+7.24 s | 12:09:35.19+12.99 s | 5.75 | – |
| STISart Tilman | 43.0 | 358 | 12:09:30.08+7.88 s | – | – | – |
| LCHLa Chartreuse | 49.2 | 1 | 12:09:30.92+8.72 s | 12:09:36.71+14.51 s | 5.79 | – |
| MEMHMembach | 54.8 | 33 | 12:09:31.63+9.43 s | 12:09:38.36+16.16 s | 6.73 | – |
| TNLTernell | 58.0 | 41 | 12:09:32.14+9.94 s | 12:09:38.77+16.57 s | 6.63 | – |
| MRDMaredsous | 59.7 | 282 | 12:09:32.18+9.98 s | 12:09:39.94+17.74 s | 7.76 | – |
| EBNEben-Emael | 67.1 | 5 | 12:09:33.86+11.66 s | – | – | – |
| WLFWalferdange | 71.7 | 145 | 12:09:34.97+12.77 s | 12:09:43.83+21.63 s | 8.86 | – |
| DOUDourbes | 71.9 | 261 | 12:09:34.45+12.25 s | – | – | – |
| SNFSeneffe | 99.2 | 291 | 12:09:38.37+16.17 s | – | – | – |
| RQRRonquières | 107.1 | 296 | 12:09:39.77+17.57 s | – | – | – |
| SKQSteenkerque | 118.4 | 296 | 12:09:41.98+19.78 s | – | – | – |
| BOUBougnies | 119.0 | 281 | 12:09:41.23+19.03 s | – | – | – |