VEZIN (BE)
Known mine explosion21 February 2014
- Magnitude
- 1.5ML
- Depth
- 2.9km ± 6.5
- Belgian time
- 14:20:172014-02-21
- UTC
- 13:20:172014-02-21
Main parameters
| Date and time | 2014-02-21 13:20:17 UTC 2014-02-21 14:20:17 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.494° N, 5.005° E Uncertainty ± 2.0 km |
| Depth of hypocenter | 2.9 ± 6.5 km |
| Event ID | ROB 5057 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2014-02-21 14:49:39 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
- 12
- Epicentral distance
- 13.4 – 123.5km
- Mean velocity, P wave
- 5.8km/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 2.9 km. P wave: 11 measurements, root-mean-square deviation 0.69 s. S wave: 4 measurements, root-mean-square deviation 0.25 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)12 stations | ||||||
| GESGesves | 13.4 | 154 | 13:20:19.70+1.87 s | 13:20:22.20+4.37 s | 2.50 | – |
| CLAClavier | 22.7 | 111 | 13:20:21.48+3.65 s | 13:20:24.30+6.47 s | 2.82 | 22.0 |
| MRDMaredsous | 27.2 | 218 | 13:20:22.14+4.31 s | – | – | – |
| RCHRochefort | 40.9 | 157 | 13:20:24.89+7.06 s | – | – | – |
| STISart Tilman | 40.9 | 76 | 13:20:25.20+7.37 s | – | – | – |
| LCHLa Chartreuse | 45.1 | 69 | 13:20:25.41+7.58 s | 13:20:31.31+13.48 s | 5.90 | 31.0 |
| DOUDourbes | 53.1 | 214 | 13:20:27.15+9.32 s | 13:20:33.88+16.05 s | 6.73 | – |
| SKQSteenkerque | 67.8 | 285 | 13:20:27.22+9.39 s | – | – | – |
| MEMSMembach | 72.4 | 79 | 13:20:30.30+12.47 s | – | – | – |
| HOUHouvegnez | 72.8 | 102 | 13:20:30.45+12.62 s | – | – | – |
| KLBKalborn | 90.0 | 119 | 13:20:33.56+15.73 s | – | – | – |
| WLFWalferdange | 123.5 | 138 | 13:20:38.44+20.61 s | – | – | – |