GELBRESSEE (BE)
Known mine explosion21 March 2014
- Magnitude
- 1.9ML
- Depth
- 8.5km ± 5.1
- Belgian time
- 14:18:182014-03-21
- UTC
- 13:18:182014-03-21
Main parameters
| Date and time | 2014-03-21 13:18:18 UTC 2014-03-21 14:18:18 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.503° N, 4.964° E Uncertainty ± 1.6 km |
| Depth of hypocenter | 8.5 ± 5.1 km |
| Event ID | ROB 5082 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2014-03-24 08:38:15 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
- 15.8 – 126.2km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.3km/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 8.5 km. P wave: 13 measurements, root-mean-square deviation 0.44 s. S wave: 6 measurements, root-mean-square deviation 0.43 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)14 stations | ||||||
| GESGesves | 15.8 | 146 | 13:18:20.71+2.12 s | – | – | – |
| CLAClavier | 25.7 | 111 | 13:18:22.33+3.74 s | 13:18:26.68+8.09 s | 4.35 | – |
| MRDMaredsous | 26.4 | 212 | 13:18:23.23+4.64 s | – | – | – |
| RCHRochefort | 43.0 | 154 | 13:18:25.67+7.08 s | 13:18:32.16+13.57 s | 6.49 | – |
| STISart Tilman | 43.4 | 78 | 13:18:26.69+8.10 s | – | – | – |
| LCHLa Chartreuse | 47.4 | 71 | 13:18:26.52+7.93 s | 13:18:32.34+13.75 s | 5.82 | 37.1 |
| SNFSeneffe | 48.3 | 271 | 13:18:26.06+7.47 s | – | – | – |
| DOUDourbes | 52.5 | 210 | 13:18:28.04+9.45 s | 13:18:34.80+16.21 s | 6.76 | 45.7 |
| SKQSteenkerque | 64.7 | 285 | 13:18:29.30+10.71 s | 13:18:38.17+19.58 s | 8.87 | – |
| BOUBougnies | 73.5 | 260 | 13:18:30.92+12.33 s | – | – | – |
| MEMHMembach | 75.0 | 81 | 13:18:31.57+12.98 s | 13:18:40.85+22.26 s | 9.28 | – |
| HOUHouvegnez | 75.8 | 102 | 13:18:31.05+12.46 s | – | – | – |
| KLBKalborn | 93.1 | 118 | 13:18:34.69+16.10 s | – | – | – |
| WLFWalferdange | 126.2 | 137 | 13:18:40.35+21.76 s | 13:18:54.04+35.45 s | 13.69 | – |