FERNELMONT (BE)
Quarry blast21 March 2017
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 14:17:132017-03-21
- UTC
- 13:17:132017-03-21
Main parameters
| Date and time | 2017-03-21 13:17:13 UTC 2017-03-21 14:17:13 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.528° N, 4.953° E Uncertainty ± 2.2 km |
| Event ID | ROB 5655 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-03-21 14:25:46 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
- 17
- Epicentral distance
- 18.5 – 79.6km
- Mean velocity, P wave
- 5.7km/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: 17 measurements, root-mean-square deviation 0.32 s. S wave: 6 measurements, root-mean-square deviation 0.46 s.
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)16 stations | |||||
| GESGesves | 18.5 | 149 | 13:17:15.96+2.62 s | 13:17:18.05+4.71 s | 2.09 |
| CLAClavier | 27.6 | 116 | 13:17:18.04+4.70 s | – | – |
| MRDMaredsous | 28.3 | 208 | 13:17:18.55+5.21 s | 13:17:21.51+8.17 s | 2.96 |
| RCHRochefort | 45.8 | 155 | 13:17:21.21+7.87 s | 13:17:26.58+13.24 s | 5.37 |
| LCHLa Chartreuse | 47.4 | 75 | 13:17:22.23+8.89 s | – | – |
| UCCSUccle | 51.5 | 306 | 13:17:22.15+8.81 s | – | – |
| RQRRonquières | 52.3 | 280 | 13:17:22.44+9.10 s | – | – |
| DOUDourbes | 54.4 | 208 | 13:17:23.25+9.91 s | – | – |
| BRQBracquegnies | 58.2 | 265 | 13:17:23.38+10.04 s | – | – |
| SKQSteenkerque | 63.3 | 283 | 13:17:24.26+10.92 s | – | – |
| BOUBougnies | 73.2 | 258 | 13:17:25.66+12.32 s | – | – |
| MEMSMembach | 75.5 | 83 | 13:17:26.57+13.23 s | – | – |
| MEMHMembach | 75.5 | 83 | 13:17:26.71+13.37 s | 13:17:35.10+21.76 s | 8.39 |
| MOLTMol | 76.9 | 7 | 13:17:26.67+13.33 s | – | – |
| HOUHouvegnez | 77.2 | 104 | 13:17:26.58+13.24 s | 13:17:35.12+21.78 s | 8.54 |
| MRGMont Rigi | 79.6 | 91 | 13:17:26.65+13.31 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 74.1 | 69 | 13:17:25.92+12.58 s | 13:17:35.58+22.24 s | 9.66 |