GREVENMACHER (DE)
Quarry blast22 May 2019
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 10:33:092019-05-22
- UTC
- 08:33:092019-05-22
Main parameters
| Date and time | 2019-05-22 08:33:09 UTC 2019-05-22 10:33:09 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 49.823° N, 6.524° E Uncertainty ± 4.2 km |
| Event ID | ROB 8180 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-05-22 10:56:22 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
- 12
- Epicentral distance
- 26.3 – 156.7km
- Mean velocity, P wave
- 5.6km/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: 7 measurements, root-mean-square deviation 0.20 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)11 stations | |||||
| VIAVianden | 26.3 | 298 | 08:33:13.71+4.28 s | – | – |
| KLBKalborn | 42.9 | 316 | 08:33:16.93+7.50 s | – | – |
| HOUHouvegnez | 69.8 | 328 | 08:33:21.49+12.06 s | – | – |
| MEMSMembach | 94.8 | 337 | 08:33:25.69+16.26 s | – | – |
| MEMHMembach | 94.8 | 337 | 08:33:25.70+16.27 s | – | – |
| CLAClavier | 109.7 | 308 | 08:33:28.57+19.14 s | – | – |
| GESGesves | 120.4 | 302 | 08:33:30.46+21.03 s | – | – |
| EBNEben-Emael | 124.0 | 331 | 08:33:31.33+21.90 s | – | – |
| MRDMaredsous | 136.6 | 294 | 08:33:32.37+22.94 s | 08:33:47.60+38.17 s | 15.23 |
| DOUDourbes | 141.7 | 283 | 08:33:33.47+24.04 s | 08:33:49.40+39.97 s | 15.93 |
| OPTBOpitter | 156.7 | 337 | 08:33:36.04+26.61 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 112.9 | 338 | 08:33:29.49+20.06 s | – | – |