ANDENNE (BE)
Quarry blast30 September 2020
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 14:19:432020-09-30
- UTC
- 12:19:432020-09-30
Main parameters
| Date and time | 2020-09-30 12:19:43 UTC 2020-09-30 14:19:43 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.503° N, 4.983° E Uncertainty ± 1.1 km |
| Event ID | ROB 10980 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-09-30 15:26:36 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
- 15.1 – 53.2km
- Mean velocity, P wave
- 6.0km/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: 6 measurements, root-mean-square deviation 0.24 s. S wave: 6 measurements, root-mean-square deviation 0.25 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 | |||||
| GESGesves | 15.1 | 151 | 12:19:45.66+2.41 s | 12:19:47.99+4.74 s | 2.33 |
| CLAClavier | 24.5 | 112 | 12:19:47.90+4.65 s | 12:19:51.22+7.97 s | 3.32 |
| MRDMaredsous | 27.1 | 214 | 12:19:48.28+5.03 s | 12:19:52.14+8.89 s | 3.86 |
| TGATangissart | 34.6 | 289 | 12:19:49.41+6.16 s | 12:19:53.70+10.45 s | 4.29 |
| RCHRochefort | 42.5 | 156 | 12:19:50.50+7.25 s | 12:19:56.18+12.93 s | 5.68 |
| DOUDourbes | 53.2 | 211 | 12:19:52.70+9.45 s | 12:19:59.30+16.05 s | 6.60 |