WAIMES (BE)
Quarry blast21 August 2017
- Magnitude
- 0.9ML
- Depth
- 1.3km ± 2.5
- Belgian time
- 19:06:122017-08-21
- UTC
- 17:06:122017-08-21
Main parameters
| Date and time | 2017-08-21 17:06:12 UTC 2017-08-21 19:06:12 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.418° N, 6.093° E Uncertainty ± 1.1 km |
| Depth of hypocenter | 1.3 ± 2.5 km |
| Event ID | ROB 5850 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-08-21 19:37:49 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
- 14
- Epicentral distance
- 9.5 – 145.0km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.4km/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. Hypocenter at a depth of 1.3 km. P wave: 13 measurements, root-mean-square deviation 0.33 s. S wave: 4 measurements, root-mean-square deviation 0.08 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)14 stations | ||||||
| HOUHouvegnez | 9.5 | 221 | 17:06:14.30+1.63 s | 17:06:15.35+2.68 s | 1.05 | – |
| MRGMont Rigi | 10.4 | 353 | 17:06:14.31+1.64 s | – | – | – |
| MEMHMembach | 22.0 | 345 | 17:06:16.43+3.76 s | 17:06:19.20+6.53 s | 2.77 | – |
| KLBKalborn | 35.4 | 178 | 17:06:18.98+6.31 s | – | – | – |
| STISart Tilman | 41.7 | 296 | 17:06:20.23+7.56 s | – | – | – |
| LCHLa Chartreuse | 42.8 | 305 | 17:06:19.99+7.32 s | – | – | – |
| VIAVianden | 54.3 | 172 | 17:06:21.98+9.31 s | – | – | – |
| CLAClavier | 56.2 | 270 | 17:06:22.33+9.66 s | 17:06:29.26+16.59 s | 6.93 | 3.6 |
| GESGesves | 71.6 | 267 | 17:06:23.96+11.29 s | – | – | – |
| WLFWalferdange | 84.0 | 177 | 17:06:27.37+14.70 s | – | – | – |
| MRDMaredsous | 95.1 | 263 | 17:06:29.04+16.37 s | – | – | – |
| DOUDourbes | 112.7 | 252 | 17:06:31.67+19.00 s | 17:06:46.16+33.49 s | 14.49 | – |
| DSLBDessel | 115.9 | 322 | 17:06:32.78+20.11 s | – | – | – |
| SKQSteenkerque | 145.0 | 281 | 17:06:37.24+24.57 s | – | – | – |