ANDENNE (BE)
Quarry blast1 September 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:47:572020-09-01
- UTC
- 11:47:572020-09-01
Main parameters
| Date and time | 2020-09-01 11:47:57 UTC 2020-09-01 13:47:57 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.490° N, 4.988° E Uncertainty ± 1.0 km |
| Event ID | ROB 10765 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-09-02 09:29:51 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
- 13
- Epicentral distance
- 13.7 – 90.9km
- Mean velocity, P wave
- 6.1km/s
- Mean velocity, S wave
- 3.5km/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: 13 measurements, root-mean-square deviation 0.48 s. S wave: 8 measurements, root-mean-square deviation 0.54 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)12 stations | |||||
| GESGesves | 13.7 | 149 | 11:48:00.01+2.23 s | 11:48:02.30+4.52 s | 2.29 |
| CLAClavier | 23.7 | 110 | 11:48:02.35+4.57 s | 11:48:05.32+7.54 s | 2.97 |
| MRDMaredsous | 26.2 | 217 | 11:48:02.36+4.58 s | 11:48:06.13+8.35 s | 3.77 |
| RCHRochefort | 41.0 | 155 | 11:48:04.94+7.16 s | 11:48:11.14+13.36 s | 6.20 |
| LCHLa Chartreuse | 46.3 | 69 | 11:48:06.03+8.25 s | – | – |
| DOUDourbes | 52.2 | 213 | 11:48:07.26+9.48 s | – | – |
| RQRRonquières | 55.6 | 284 | 11:48:08.03+10.25 s | – | – |
| UCCBUccle | 56.0 | 308 | 11:48:08.19+10.41 s | 11:48:14.76+16.98 s | 6.57 |
| SKQSteenkerque | 66.7 | 286 | 11:48:08.26+10.48 s | 11:48:16.89+19.11 s | 8.63 |
| HOUHouvegnez | 73.8 | 101 | 11:48:10.52+12.74 s | – | – |
| OPTBOpitter | 82.9 | 33 | 11:48:12.37+14.59 s | – | – |
| KLBKalborn | 90.9 | 118 | 11:48:13.73+15.95 s | 11:48:23.41+25.63 s | 9.68 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.4 | 65 | 11:48:10.05+12.27 s | 11:48:19.63+21.85 s | 9.58 |