FERNELMONT (BE)
Quarry blast21 January 2020
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 14:15:412020-01-21
- UTC
- 13:15:412020-01-21
Main parameters
| Date and time | 2020-01-21 13:15:41 UTC 2020-01-21 14:15:41 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.517° N, 4.987° E Uncertainty ± 2.2 km |
| Event ID | ROB 9160 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-01-21 14:40:13 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
- 16.3 – 92.4km
- Mean velocity, P wave
- 5.6km/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 0.45 s. S wave: 4 measurements, root-mean-square deviation 0.32 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)15 stations | |||||
| GESGesves | 16.3 | 154 | 13:15:44.09+2.47 s | 13:15:45.52+3.90 s | 1.43 |
| CLAClavier | 24.9 | 116 | 13:15:45.92+4.30 s | – | – |
| MRDMaredsous | 28.5 | 213 | 13:15:46.47+4.85 s | 13:15:49.78+8.16 s | 3.31 |
| TGATangissart | 34.4 | 287 | 13:15:47.48+5.86 s | 13:15:51.75+10.13 s | 4.27 |
| RCHRochefort | 43.7 | 157 | 13:15:49.03+7.41 s | – | – |
| LCHLa Chartreuse | 45.4 | 72 | 13:15:49.65+8.03 s | – | – |
| UCCBUccle | 54.2 | 305 | 13:15:50.72+9.10 s | – | – |
| DOUDourbes | 54.6 | 211 | 13:15:51.07+9.45 s | 13:15:57.25+15.63 s | 6.18 |
| SKQSteenkerque | 65.9 | 283 | 13:15:52.40+10.78 s | – | – |
| HOUHouvegnez | 74.6 | 104 | 13:15:55.81+14.19 s | – | – |
| BOUBougnies | 75.4 | 260 | 13:15:54.65+13.03 s | – | – |
| MRGMont Rigi | 77.2 | 90 | 13:15:54.99+13.37 s | – | – |
| MOLSMol | 77.8 | 5 | 13:15:55.52+13.90 s | – | – |
| OPTBOpitter | 80.5 | 34 | 13:15:55.67+14.05 s | – | – |
| KLBKalborn | 92.4 | 120 | 13:15:57.81+16.19 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| VKBValkenburg | 68.5 | 55 | 13:15:52.44+10.82 s | – | – |
| HGNHeimansgroeve | 72.3 | 67 | 13:15:54.18+12.56 s | – | – |