ENGIS (BE)
Quarry blast26 November 2020
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 14:49:042020-11-26
- UTC
- 13:49:042020-11-26
Main parameters
| Date and time | 2020-11-26 13:49:04 UTC 2020-11-26 14:49:04 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.537° N, 5.361° E Uncertainty ± 1.1 km |
| Event ID | ROB 11410 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-11-28 17:09:21 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
- 13.8 – 73.5km
- Mean velocity, P wave
- 6.2km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 9 measurements, root-mean-square deviation 0.27 s. S wave: 6 measurements, root-mean-square deviation 0.73 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)8 stations | |||||
| CLAClavier | 13.8 | 198 | 13:49:07.30+3.19 s | 13:49:08.97+4.86 s | 1.67 |
| GESGesves | 25.8 | 229 | 13:49:08.97+4.86 s | 13:49:12.33+8.22 s | 3.36 |
| EBNEben-Emael | 36.6 | 38 | 13:49:10.65+6.54 s | 13:49:15.37+11.26 s | 4.72 |
| RCHRochefort | 43.6 | 193 | 13:49:11.26+7.15 s | – | – |
| MEMHMembach | 46.7 | 80 | 13:49:12.56+8.45 s | 13:49:18.46+14.35 s | 5.90 |
| MRDMaredsous | 49.6 | 238 | 13:49:12.55+8.44 s | – | – |
| HOUHouvegnez | 50.1 | 114 | 13:49:12.43+8.32 s | – | – |
| DOUDourbes | 73.5 | 228 | 13:49:16.54+12.43 s | 13:49:27.31+23.20 s | 10.77 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 47.6 | 58 | 13:49:12.42+8.31 s | 13:49:17.22+13.11 s | 4.80 |