WALCOURT (BE)
Quarry blast16 January 2019
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 11:41:422019-01-16
- UTC
- 10:41:422019-01-16
Main parameters
| Date and time | 2019-01-16 10:41:42 UTC 2019-01-16 11:41:42 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.223° N, 4.488° E Uncertainty ± 1.4 km |
| Event ID | ROB 7635 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-01-16 14:03:05 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
- 6
- Epicentral distance
- 16.2 – 64.5km
- Mean velocity, P wave
- 6.5km/s
- Mean velocity, S wave
- 3.6km/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: 6 measurements, root-mean-square deviation 0.33 s. S wave: 5 measurements, root-mean-square deviation 0.33 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)6 stations | |||||
| DOUDourbes | 16.2 | 152 | 10:41:45.50+3.44 s | 10:41:47.20+5.14 s | 1.70 |
| MRDMaredsous | 21.8 | 66 | 10:41:46.60+4.54 s | 10:41:49.48+7.42 s | 2.88 |
| GESGesves | 46.3 | 67 | 10:41:49.77+7.71 s | 10:41:56.20+14.14 s | 6.43 |
| RCHRochefort | 53.3 | 98 | 10:41:50.92+8.86 s | 10:41:57.40+15.34 s | 6.48 |
| SKQSteenkerque | 55.5 | 329 | 10:41:51.70+9.64 s | 10:41:58.24+16.18 s | 6.54 |
| UCCSUccle | 64.5 | 352 | 10:41:53.55+11.49 s | – | – |