ANDENNE (BE)
Quarry blast29 May 2018
- Magnitude
- 2.1ML
- Depth
- –
- Belgian time
- 14:18:162018-05-29
- UTC
- 12:18:162018-05-29
Main parameters
| Date and time | 2018-05-29 12:18:16 UTC 2018-05-29 14:18:16 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 50.486° N, 5.023° E Uncertainty ± 3.2 km |
| Event ID | ROB 6650 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-05-30 15:43:52 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
- 9
- Epicentral distance
- 12.1 – 122.0km
- Mean velocity, P wave
- 5.5km/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: 8 measurements, root-mean-square deviation 0.22 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)9 stations | |||||
| GESGesves | 12.1 | 158 | 12:18:18.00+1.58 s | 12:18:19.54+3.12 s | 1.54 |
| CLAClavier | 21.2 | 110 | 12:18:20.10+3.68 s | – | – |
| MRDMaredsous | 27.3 | 222 | 12:18:20.43+4.01 s | 12:18:24.37+7.95 s | 3.94 |
| LCHLa Chartreuse | 44.2 | 67 | 12:18:23.93+7.51 s | – | – |
| DOUDourbes | 53.1 | 215 | 12:18:25.37+8.95 s | 12:18:31.81+15.39 s | 6.44 |
| UCCSUccle | 58.3 | 307 | 12:18:26.65+10.23 s | – | – |
| MEMSMembach | 71.3 | 79 | 12:18:28.63+12.21 s | – | – |
| VIAVianden | 104.1 | 126 | 12:18:34.74+18.32 s | – | – |
| WLFWalferdange | 122.0 | 138 | 12:18:37.82+21.40 s | – | – |