LA ROCHE-EN-ARDENNE (BE)
Known mine explosion16 July 2015
- Magnitude
- –
- Depth
- –
- Belgian time
- 14:19:512015-07-16
- UTC
- 12:19:512015-07-16
Main parameters
| Date and time | 2015-07-16 12:19:51 UTC 2015-07-16 14:19:51 Belgian time |
|---|---|
| Magnitude | – |
| Epicentral coordinates | 50.191° N, 5.610° E Uncertainty ± 1.1 km |
| Event ID | ROB 5384 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2015-07-16 16:06:55 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
- 14
- Epicentral distance
- 27.7 – 120.7km
- Mean velocity, P wave
- 5.5km/s
- Mean velocity, S wave
- 3.4km/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: 11 measurements, root-mean-square deviation 0.27 s. S wave: 8 measurements, root-mean-square deviation 2.09 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)14 stations | |||||
| RCHRochefort | 27.7 | 262 | 12:19:55.70+4.65 s | 12:19:59.14+8.09 s | 3.44 |
| HOUHouvegnez | 33.5 | 57 | 12:19:56.88+5.83 s | – | – |
| CLAClavier | 33.5 | 319 | 12:19:56.78+5.73 s | 12:20:01.12+10.07 s | 4.34 |
| GESGesves | 43.1 | 300 | 12:19:58.24+7.19 s | 12:20:04.21+13.16 s | 5.97 |
| STISart Tilman | 43.7 | 356 | 12:19:58.92+7.87 s | – | – |
| MRGMont Rigi | 48.6 | 43 | 12:19:59.50+8.45 s | – | – |
| LCHLa Chartreuse | 49.8 | 359 | – | 12:19:59.95+8.90 s | – |
| MEMSMembach | 54.5 | 31 | 12:20:00.56+9.51 s | 12:20:07.44+16.39 s | 6.88 |
| MRDMaredsous | 61.3 | 282 | 12:20:01.29+10.24 s | 12:20:08.89+17.84 s | 7.60 |
| WLFWalferdange | 70.3 | 146 | 12:20:03.51+12.46 s | 12:20:11.93+20.88 s | 8.42 |
| DOUDourbes | 73.4 | 262 | 12:20:03.47+12.42 s | 12:20:14.27+23.22 s | 10.80 |
| RQRRonquières | 108.8 | 296 | 12:20:09.96+18.91 s | – | – |
| SKQSteenkerque | 120.1 | 296 | 12:20:11.15+20.10 s | – | – |
| BOUBougnies | 120.7 | 281 | 12:20:11.77+20.72 s | – | – |