ANDENNE (BE)
Quarry blast12 October 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 13:46:572020-10-12
- UTC
- 11:46:572020-10-12
Main parameters
| Date and time | 2020-10-12 11:46:57 UTC 2020-10-12 13:46:57 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.507° N, 4.971° E Uncertainty ± 2.2 km |
| Event ID | ROB 11085 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-10-15 11:44:25 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
- 7
- Epicentral distance
- 15.9 – 74.5km
- Mean velocity, P wave
- 5.4km/s
- Mean velocity, S wave
- 3.0km/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: 7 measurements, root-mean-square deviation 0.29 s. S wave: 5 measurements, root-mean-square deviation 0.23 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)7 stations | |||||
| GESGesves | 15.9 | 149 | 11:47:00.21+2.28 s | 11:47:02.40+4.47 s | 2.19 |
| CLAClavier | 25.5 | 113 | 11:47:01.81+3.88 s | 11:47:06.03+8.10 s | 4.22 |
| MRDMaredsous | 27.0 | 212 | 11:47:02.52+4.59 s | 11:47:06.23+8.30 s | 3.71 |
| RCHRochefort | 43.2 | 155 | 11:47:05.66+7.73 s | 11:47:12.06+14.13 s | 6.40 |
| DOUDourbes | 53.1 | 210 | 11:47:07.69+9.76 s | 11:47:14.79+16.86 s | 7.10 |
| SKQSteenkerque | 65.1 | 284 | 11:47:09.05+11.12 s | – | – |
| MEMHMembach | 74.5 | 81 | 11:47:11.03+13.10 s | – | – |