ANDENNE (BE)
Quarry blast14 July 2020
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:53:482020-07-14
- UTC
- 11:53:482020-07-14
Main parameters
| Date and time | 2020-07-14 11:53:48 UTC 2020-07-14 13:53:48 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.509° N, 4.996° E Uncertainty ± 0.6 km |
| Event ID | ROB 10470 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-07-14 17:10:23 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
- 5
- Epicentral distance
- 15.3 – 72.0km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.3km/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: 5 measurements, root-mean-square deviation 0.24 s. S wave: 5 measurements, root-mean-square deviation 0.38 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)4 stations | |||||
| GESGesves | 15.3 | 155 | 11:53:50.70+2.30 s | 11:53:52.93+4.53 s | 2.23 |
| CLAClavier | 23.9 | 115 | 11:53:52.64+4.24 s | 11:53:56.19+7.79 s | 3.55 |
| MRDMaredsous | 28.2 | 215 | 11:53:53.38+4.98 s | 11:53:57.54+9.14 s | 4.16 |
| RCHRochefort | 42.7 | 157 | 11:53:56.00+7.60 s | 11:54:01.85+13.45 s | 5.85 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 72.0 | 66 | 11:54:00.92+12.52 s | 11:54:09.89+21.49 s | 8.97 |