TUBIZE (BE)
Quarry blast23 March 2021
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 11:38:442021-03-23
- UTC
- 10:38:442021-03-23
Main parameters
| Date and time | 2021-03-23 10:38:44 UTC 2021-03-23 11:38:44 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.703° N, 4.178° E Uncertainty ± 4.4 km |
| Event ID | ROB 12840 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-26 18:49:55 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
- 8
- Epicentral distance
- 9.2 – 73.9km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.3km/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: 8 measurements, root-mean-square deviation 0.53 s. S wave: 5 measurements, root-mean-square deviation 0.56 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)8 stations | |||||
| SKQSteenkerque | 9.2 | 229 | 10:38:46.95+1.99 s | 10:38:47.63+2.67 s | 0.68 |
| RQRRonquières | 11.3 | 163 | 10:38:46.30+1.34 s | – | – |
| UCCBUccle | 16.5 | 51 | 10:38:48.56+3.60 s | 10:38:49.60+4.64 s | 1.04 |
| SNFSeneffe | 22.7 | 161 | 10:38:49.50+4.54 s | – | – |
| TGATangissart | 26.7 | 114 | 10:38:50.30+5.34 s | 10:38:52.83+7.87 s | 2.53 |
| MRDMaredsous | 61.2 | 137 | 10:38:55.11+10.15 s | – | – |
| GESGesves | 73.5 | 118 | 10:38:58.45+13.49 s | 10:39:06.71+21.75 s | 8.26 |
| DOUDourbes | 73.9 | 156 | 10:38:58.04+13.08 s | 10:39:08.40+23.44 s | 10.36 |