NAMUR (BE)
Quarry blast3 October 2019
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 14:54:412019-10-03
- UTC
- 12:54:412019-10-03
Main parameters
| Date and time | 2019-10-03 12:54:41 UTC 2019-10-03 14:54:41 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.498° N, 4.968° E Uncertainty ± 0.8 km |
| Event ID | ROB 8705 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-10-03 15:22:39 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
- 4
- Epicentral distance
- 15.1 – 52.1km
- Mean velocity, P wave
- 5.6km/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: 4 measurements, root-mean-square deviation 0.22 s. S wave: 4 measurements, root-mean-square deviation 0.29 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)4 stations | |||||
| GESGesves | 15.1 | 146 | 12:54:43.26+2.24 s | 12:54:45.39+4.37 s | 2.13 |
| CLAClavier | 25.3 | 110 | 12:54:45.32+4.30 s | 12:54:49.13+8.11 s | 3.81 |
| MRDMaredsous | 26.0 | 213 | 12:54:45.80+4.78 s | 12:54:49.50+8.48 s | 3.70 |
| DOUDourbes | 52.1 | 211 | 12:54:50.14+9.12 s | 12:54:57.12+16.10 s | 6.98 |