FERNELMONT (BE)
Quarry blast17 November 2020
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 14:34:442020-11-17
- UTC
- 13:34:442020-11-17
Main parameters
| Date and time | 2020-11-17 13:34:44 UTC 2020-11-17 14:34:44 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.528° N, 4.984° E Uncertainty ± 2.8 km |
| Event ID | ROB 11335 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-11-18 08:32:17 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
- 11
- Epicentral distance
- 17.5 – 109.1km
- Mean velocity, P wave
- 4.9km/s
- Mean velocity, S wave
- 3.0km/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: 10 measurements, root-mean-square deviation 0.60 s. S wave: 5 measurements, root-mean-square deviation 0.40 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)11 stations | |||||
| GESGesves | 17.5 | 155 | 13:34:46.14+1.82 s | – | – |
| CLAClavier | 25.6 | 118 | 13:34:48.16+3.84 s | 13:34:51.72+7.40 s | 3.56 |
| MRDMaredsous | 29.5 | 212 | 13:34:48.61+4.29 s | 13:34:52.29+7.97 s | 3.68 |
| TGATangissart | 33.8 | 285 | 13:34:49.79+5.47 s | – | – |
| RCHRochefort | 45.0 | 157 | 13:34:51.18+6.86 s | 13:34:57.21+12.89 s | 6.03 |
| RQRRonquières | 54.5 | 279 | 13:34:53.32+9.00 s | – | – |
| DOUDourbes | 55.6 | 210 | – | 13:35:00.92+16.60 s | – |
| SKQSteenkerque | 65.4 | 282 | 13:34:54.70+10.38 s | 13:35:04.90+20.58 s | 10.20 |
| MEMHMembach | 73.2 | 83 | 13:34:56.78+12.46 s | – | – |
| MRGMont Rigi | 77.4 | 91 | 13:34:57.78+13.46 s | – | – |
| VIAVianden | 109.1 | 127 | 13:35:05.77+21.45 s | – | – |