SOIGNIES (BE)
Quarry blast16 November 2021
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 13:00:062021-11-16
- UTC
- 12:00:062021-11-16
Main parameters
| Date and time | 2021-11-16 12:00:06 UTC 2021-11-16 13:00:06 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.572° N, 3.988° E Uncertainty ± 24.0 km |
| Event ID | ROB 14750 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-11-16 16:39:21 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
- 10.7 – 99.7km
- Mean velocity, P wave
- 5.6km/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: 7 measurements, root-mean-square deviation 0.28 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)7 stations | |||||
| SKQSteenkerque | 10.7 | 37 | 12:00:08.68+2.10 s | – | – |
| BRQBracquegnies | 14.6 | 134 | 12:00:09.31+2.73 s | – | – |
| RQRRonquières | 17.2 | 77 | 12:00:09.93+3.35 s | – | – |
| SNFSeneffe | 22.1 | 108 | 12:00:10.08+3.50 s | – | – |
| TGATangissart | 38.0 | 84 | 12:00:13.42+6.84 s | 12:00:17.79+11.21 s | 4.37 |
| DOUDourbes | 68.5 | 141 | 12:00:18.38+11.80 s | – | – |
| RCHRochefort | 99.7 | 117 | 12:00:24.59+18.01 s | 12:00:36.07+29.49 s | 11.48 |
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