REBECQ (BE)
Quarry blast10 September 2019
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 12:07:442019-09-10
- UTC
- 10:07:442019-09-10
Main parameters
| Date and time | 2019-09-10 10:07:44 UTC 2019-09-10 12:07:44 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.667° N, 4.150° E Uncertainty ± 1.2 km |
| Event ID | ROB 8635 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-09-10 12:47:02 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
- 10
- Epicentral distance
- 5.4 – 131.7km
- Mean velocity, P wave
- 5.9km/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 0.18 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)10 stations | |||||
| SKQSteenkerque | 5.4 | 248 | 10:07:45.44+1.12 s | 10:07:46.21+1.89 s | 0.77 |
| RQRRonquières | 8.6 | 142 | 10:07:45.75+1.43 s | – | – |
| UCCBUccle | 20.7 | 46 | 10:07:48.19+3.87 s | 10:07:50.32+6.00 s | 2.13 |
| UCCSUccle | 20.7 | 46 | 10:07:48.29+3.97 s | – | – |
| BRQBracquegnies | 20.7 | 183 | 10:07:48.03+3.71 s | – | – |
| MRDMaredsous | 59.8 | 133 | 10:07:54.98+10.66 s | – | – |
| GESGesves | 73.5 | 115 | 10:07:57.08+12.76 s | – | – |
| CLAClavier | 86.2 | 108 | 10:07:58.97+14.65 s | – | – |
| MEMSMembach | 131.7 | 92 | 10:08:07.19+22.87 s | – | – |
| MEMHMembach | 131.7 | 92 | 10:08:07.21+22.89 s | 10:08:23.53+39.21 s | 16.32 |