ENGIS (BE)
Quarry blast9 July 2019
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 14:04:582019-07-09
- UTC
- 12:04:582019-07-09
Main parameters
| Date and time | 2019-07-09 12:04:58 UTC 2019-07-09 14:04:58 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.570° N, 5.459° E Uncertainty ± 1.8 km |
| Event ID | ROB 8355 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-07-09 14:15:29 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
- 12.5 – 81.7km
- Mean velocity, P wave
- 5.5km/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: 12 measurements, root-mean-square deviation 0.39 s. S wave: 7 measurements, root-mean-square deviation 0.89 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)10 stations | |||||
| LCHLa Chartreuse | 12.5 | 52 | 12:04:59.41+1.03 s | 12:05:01.31+2.93 s | 1.90 |
| CLAClavier | 20.1 | 214 | 12:05:01.42+3.04 s | 12:05:03.36+4.98 s | 1.94 |
| GESGesves | 33.5 | 232 | 12:05:03.78+5.40 s | 12:05:09.34+10.96 s | 5.56 |
| MRGMont Rigi | 44.2 | 98 | 12:05:06.39+8.01 s | 12:05:11.99+13.61 s | 5.60 |
| MRDMaredsous | 57.4 | 239 | 12:05:08.09+9.71 s | – | – |
| KLBKalborn | 69.8 | 138 | 12:05:11.06+12.68 s | 12:05:19.67+21.29 s | 8.61 |
| MOLTMol | 76.3 | 340 | 12:05:11.93+13.55 s | – | – |
| DOUDourbes | 81.1 | 230 | 12:05:12.78+14.40 s | 12:05:21.60+23.22 s | 8.82 |
| UCCBUccle | 81.7 | 288 | 12:05:12.62+14.24 s | – | – |
| UCCSUccle | 81.7 | 288 | 12:05:12.69+14.31 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 39.8 | 57 | 12:05:05.88+7.50 s | – | – |
| VKBValkenburg | 40.3 | 35 | 12:05:04.88+6.50 s | 12:05:11.53+13.15 s | 6.65 |