ANDENNE (BE)
Quarry blast16 July 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:48:512020-07-16
- UTC
- 11:48:512020-07-16
Main parameters
| Date and time | 2020-07-16 11:48:51 UTC 2020-07-16 13:48:51 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.481° N, 4.991° E Uncertainty ± 0.8 km |
| Event ID | ROB 10500 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-07-16 14:23:17 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
- 12.7 – 90.3km
- Mean velocity, P wave
- 5.9km/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: 6 measurements, root-mean-square deviation 0.27 s. S wave: 4 measurements, root-mean-square deviation 0.14 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)5 stations | |||||
| GESGesves | 12.7 | 147 | 11:48:54.41+2.70 s | 11:48:55.61+3.90 s | 1.20 |
| CLAClavier | 23.2 | 107 | 11:48:56.47+4.76 s | 11:48:58.94+7.23 s | 2.47 |
| MRDMaredsous | 25.4 | 219 | 11:48:56.69+4.98 s | 11:48:59.62+7.91 s | 2.93 |
| TGATangissart | 36.0 | 293 | 11:48:58.16+6.45 s | 11:49:02.64+10.93 s | 4.48 |
| KLBKalborn | 90.3 | 118 | 11:49:07.89+16.18 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.6 | 64 | 11:49:04.33+12.62 s | – | – |