NAMECHE (BE)
Suspected mine explosion25 April 2015
- Magnitude
- 1.4ML
- Depth
- 10.0km ± 3.4
- Belgian time
- 13:44:582015-04-25
- UTC
- 11:44:582015-04-25
Main parameters
| Date and time | 2015-04-25 11:44:58 UTC 2015-04-25 13:44:58 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.475° N, 4.982° E Uncertainty ± 1.6 km |
| Depth of hypocenter | 10.0 ± 3.4 km |
| Event ID | ROB 5316 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2015-04-25 17:19:03 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
- 12.5 – 123.1km
- Mean velocity, P wave
- 5.9km/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. Hypocenter at a depth of 10.0 km. P wave: 14 measurements, root-mean-square deviation 0.47 s. S wave: 11 measurements, root-mean-square deviation 0.78 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)16 stations | ||||||
| GESGesves | 12.5 | 143 | 11:45:00.77+1.97 s | 11:45:03.06+4.26 s | 2.29 | – |
| CLAClavier | 23.6 | 105 | 11:45:02.57+3.77 s | 11:45:06.88+8.08 s | 4.31 | 18.5 |
| MRDMaredsous | 24.6 | 218 | 11:45:03.25+4.45 s | 11:45:07.23+8.43 s | 3.98 | 36.6 |
| RCHRochefort | 39.7 | 154 | 11:45:05.74+6.94 s | 11:45:11.44+12.64 s | 5.70 | – |
| STISart Tilman | 43.0 | 74 | 11:45:06.69+7.89 s | – | – | – |
| LCHLa Chartreuse | 47.4 | 67 | 11:45:06.63+7.83 s | 11:45:12.09+13.29 s | 5.46 | – |
| DOUDourbes | 50.5 | 213 | 11:45:07.33+8.53 s | 11:45:14.02+15.22 s | 6.69 | 14.5 |
| RQRRonquières | 55.6 | 285 | 11:45:07.69+8.89 s | – | – | – |
| SKQSteenkerque | 66.8 | 287 | 11:45:09.25+10.45 s | 11:45:17.94+19.14 s | 8.69 | 8.5 |
| HOUHouvegnez | 74.0 | 100 | 11:45:11.05+12.25 s | 11:45:21.43+22.63 s | 10.38 | 9.4 |
| MEMSMembach | 74.4 | 78 | 11:45:11.91+13.11 s | 11:45:21.43+22.63 s | 9.52 | 16.5 |
| MRGMont Rigi | 77.7 | 87 | 11:45:12.23+13.43 s | – | – | – |
| TNLTernell | 82.3 | 81 | 11:45:13.14+14.34 s | – | – | – |
| LESLessines | 84.8 | 288 | – | 11:45:23.77+24.97 s | – | – |
| KLBKalborn | 90.5 | 117 | 11:45:14.70+15.90 s | 11:45:23.72+24.92 s | 9.02 | – |
| WLFWalferdange | 123.1 | 137 | – | 11:45:32.46+33.66 s | – | – |