HENNUYERES (BE)
Known mine explosion7 January 2015
- Magnitude
- 1.4ML
- Depth
- 2.7km ± 12.5
- Belgian time
- 12:47:382015-01-07
- UTC
- 11:47:382015-01-07
Main parameters
| Date and time | 2015-01-07 11:47:38 UTC 2015-01-07 12:47:38 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.651° N, 4.180° E Uncertainty ± 5.6 km |
| Depth of hypocenter | 2.7 ± 12.5 km |
| Event ID | ROB 5267 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2015-01-08 08:43:22 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
- 8
- Epicentral distance
- 5.9 – 129.5km
- Mean velocity, P wave
- 6.2km/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 2.7 km. P wave: 7 measurements, root-mean-square deviation 1.42 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)8 stations | ||||||
| RQRRonquières | 5.9 | 148 | 11:47:39.41+1.33 s | – | – | – |
| SKQSteenkerque | 7.1 | 268 | 11:47:39.18+1.10 s | 11:47:39.91+1.83 s | 0.73 | 62.7 |
| SNFSeneffe | 17.2 | 155 | 11:47:41.54+3.46 s | 11:47:43.94+5.86 s | 2.40 | – |
| UCCBUccle | 20.6 | 38 | 11:47:41.76+3.68 s | – | – | – |
| MRDMaredsous | 57.0 | 133 | 11:47:44.12+6.04 s | – | – | – |
| DOUDourbes | 68.5 | 154 | 11:47:50.81+12.73 s | – | – | – |
| GESGesves | 70.8 | 114 | 11:47:50.33+12.25 s | – | – | – |
| MEMSMembach | 129.5 | 91 | 11:48:00.21+22.13 s | – | – | – |