REBECQ (BE)
Quarry blast15 March 2022
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 14:05:402022-03-15
- UTC
- 13:05:402022-03-15
Main parameters
| Date and time | 2022-03-15 13:05:40 UTC 2022-03-15 14:05:40 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.665° N, 4.161° E Uncertainty ± 1.0 km |
| Event ID | ROB 15630 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-03-16 09:38:01 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
- 7
- Epicentral distance
- 6.0 – 125.6km
- Mean velocity, P wave
- 5.9km/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: 6 measurements, root-mean-square deviation 0.18 s. S wave: 4 measurements, root-mean-square deviation 0.26 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)6 stations | |||||
| SKQSteenkerque | 6.0 | 253 | 13:05:41.31+1.21 s | 13:05:42.12+2.02 s | 0.81 |
| RQRRonquières | 8.0 | 145 | 13:05:41.59+1.49 s | – | – |
| SNFSeneffe | 19.2 | 153 | 13:05:43.63+3.53 s | 13:05:46.34+6.24 s | 2.71 |
| UCCBUccle | 20.4 | 44 | 13:05:44.00+3.90 s | 13:05:46.46+6.36 s | 2.46 |
| BRQBracquegnies | 20.5 | 185 | 13:05:44.14+4.04 s | – | – |
| TGATangissart | 26.4 | 104 | 13:05:44.64+4.54 s | 13:05:47.71+7.61 s | 3.07 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 125.6 | 84 | 13:06:02.04+21.94 s | 13:06:17.44+37.34 s | 15.40 |