ANDENNE (BE)
Quarry blast24 November 2020
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 14:23:182020-11-24
- UTC
- 13:23:182020-11-24
Main parameters
| Date and time | 2020-11-24 13:23:18 UTC 2020-11-24 14:23:18 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.496° N, 4.991° E Uncertainty ± 1.1 km |
| Event ID | ROB 11385 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-11-24 17:16:14 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
- 15
- Epicentral distance
- 14.1 – 91.0km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.4km/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: 15 measurements, root-mean-square deviation 0.43 s. S wave: 11 measurements, root-mean-square deviation 0.68 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)13 stations | |||||
| GESGesves | 14.1 | 151 | 13:23:20.52+2.36 s | 13:23:22.74+4.58 s | 2.22 |
| CLAClavier | 23.7 | 111 | 13:23:22.68+4.52 s | 13:23:25.99+7.83 s | 3.31 |
| MRDMaredsous | 26.8 | 216 | 13:23:23.11+4.95 s | 13:23:25.82+7.66 s | 2.71 |
| RCHRochefort | 41.5 | 156 | 13:23:25.15+6.99 s | 13:23:30.64+12.48 s | 5.49 |
| SNFSeneffe | 50.2 | 272 | 13:23:27.10+8.94 s | – | – |
| DOUDourbes | 52.8 | 212 | 13:23:27.99+9.83 s | 13:23:34.47+16.31 s | 6.48 |
| RQRRonquières | 55.6 | 283 | 13:23:27.62+9.46 s | – | – |
| EBNEben-Emael | 59.0 | 55 | 13:23:28.13+9.97 s | 13:23:35.52+17.36 s | 7.39 |
| SKQSteenkerque | 66.7 | 285 | 13:23:29.60+11.44 s | – | – |
| MEMHMembach | 73.3 | 80 | 13:23:31.67+13.51 s | 13:23:41.47+23.31 s | 9.80 |
| HOUHouvegnez | 73.8 | 102 | 13:23:29.98+11.82 s | 13:23:41.44+23.28 s | 11.46 |
| BOUBougnies | 75.2 | 261 | 13:23:31.56+13.40 s | – | – |
| KLBKalborn | 91.0 | 118 | 13:23:33.88+15.72 s | 13:23:44.79+26.63 s | 10.91 |
| Dutch seismic network (KNMI)2 stations | |||||
| VKBValkenburg | 69.7 | 53 | 13:23:29.90+11.74 s | 13:23:39.51+21.35 s | 9.61 |
| HGNHeimansgroeve | 73.0 | 65 | 13:23:31.05+12.89 s | 13:23:39.18+21.02 s | 8.13 |