ANTOING (BE)
Quarry blast20 May 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 12:18:242020-05-20
- UTC
- 10:18:242020-05-20
Main parameters
| Date and time | 2020-05-20 10:18:24 UTC 2020-05-20 12:18:24 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.572° N, 3.458° E Uncertainty ± 6.3 km |
| Event ID | ROB 10065 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-05-20 12:38:34 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
- 44.8 – 134.1km
- Mean velocity, P wave
- 4.7km/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: 4 measurements, root-mean-square deviation 0.67 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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 | |||||
| SKQSteenkerque | 44.8 | 79 | 10:18:31.07+6.74 s | 10:18:37.39+13.06 s | 6.32 |
| ZEVZevekote | 74.2 | 328 | 10:18:38.04+13.71 s | – | – |
| DOUDourbes | 96.8 | 123 | 10:18:41.27+16.94 s | 10:18:53.42+29.09 s | 12.15 |
| MRDMaredsous | 97.8 | 107 | 10:18:43.13+18.80 s | – | – |
| RCHRochefort | 134.1 | 110 | 10:18:43.47+19.14 s | – | – |