ANDENNE (BE)
Quarry blast23 May 2018
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 14:24:132018-05-23
- UTC
- 12:24:132018-05-23
Main parameters
| Date and time | 2018-05-23 12:24:13 UTC 2018-05-23 14:24:13 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.477° N, 4.979° E Uncertainty ± 3.0 km |
| Event ID | ROB 6665 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-05-30 15:45:09 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
- 23.8 – 90.8km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.2km/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: 4 measurements, root-mean-square deviation 0.48 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 | |||||
| CLAClavier | 23.8 | 106 | 12:24:17.58+3.92 s | 12:24:21.04+7.38 s | 3.46 |
| MRDMaredsous | 24.6 | 218 | 12:24:17.94+4.28 s | 12:24:21.81+8.15 s | 3.87 |
| DOUDourbes | 50.6 | 213 | 12:24:22.71+9.05 s | 12:24:28.81+15.15 s | 6.10 |
| MEMSMembach | 74.5 | 78 | 12:24:26.13+12.47 s | 12:24:37.50+23.84 s | 11.37 |
| KLBKalborn | 90.8 | 117 | 12:24:29.35+15.69 s | – | – |