REBECQ (BE)
Quarry blast3 March 2020
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 11:40:512020-03-03
- UTC
- 10:40:512020-03-03
Main parameters
| Date and time | 2020-03-03 10:40:51 UTC 2020-03-03 11:40:51 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.655° N, 4.158° E Uncertainty ± 0.6 km |
| Event ID | ROB 9460 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-12 13:34:52 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
- 5.6 – 72.4km
- Mean velocity, P wave
- 5.8km/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: 6 measurements, root-mean-square deviation 0.10 s. S wave: 4 measurements, root-mean-square deviation 0.29 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 | |||||
| SKQSteenkerque | 5.6 | 263 | 10:40:52.35+1.26 s | 10:40:52.96+1.87 s | 0.61 |
| RQRRonquières | 7.2 | 139 | 10:40:52.71+1.62 s | – | – |
| BRQBracquegnies | 19.5 | 185 | 10:40:54.60+3.51 s | – | – |
| UCCBUccle | 21.3 | 42 | 10:40:55.03+3.94 s | 10:40:57.84+6.75 s | 2.81 |
| TGATangissart | 26.4 | 102 | 10:40:55.73+4.64 s | 10:40:58.63+7.54 s | 2.90 |
| GESGesves | 72.4 | 114 | 10:41:03.89+12.80 s | 10:41:13.03+21.94 s | 9.14 |