GERAARDSBERGEN (BE)
Quarry blast13 August 2018
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:01:152018-08-13
- UTC
- 11:01:152018-08-13
Main parameters
| Date and time | 2018-08-13 11:01:15 UTC 2018-08-13 13:01:15 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.783° N, 3.898° E Uncertainty ± 4.4 km |
| Event ID | ROB 7115 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-08-13 15:08:13 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
- 10
- Epicentral distance
- 8.9 – 174.5km
- Mean velocity, P wave
- 5.7km/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: 8 measurements, root-mean-square deviation 0.42 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)10 stations | |||||
| LESLessines | 8.9 | 206 | 11:01:17.26+1.75 s | – | – |
| SKQSteenkerque | 19.7 | 139 | 11:01:19.47+3.96 s | – | – |
| RQRRonquières | 30.4 | 130 | 11:01:20.85+5.34 s | – | – |
| UCCSUccle | 32.6 | 87 | 11:01:20.93+5.42 s | – | – |
| MRDMaredsous | 81.6 | 131 | 11:01:29.32+13.81 s | – | – |
| DOUDourbes | 91.1 | 147 | 11:01:31.30+15.79 s | 11:01:42.45+26.94 s | 11.15 |
| GESGesves | 95.1 | 117 | 11:01:33.07+17.56 s | – | – |
| CLAClavier | 107.3 | 112 | 11:01:34.36+18.85 s | – | – |
| LCHLa Chartreuse | 121.2 | 97 | 11:01:35.90+20.39 s | – | – |
| KLBKalborn | 174.5 | 115 | 11:01:43.92+28.41 s | – | – |