NAMUR (BE)
Quarry blast10 October 2018
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 14:28:062018-10-10
- UTC
- 12:28:062018-10-10
Main parameters
| Date and time | 2018-10-10 12:28:06 UTC 2018-10-10 14:28:06 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.477° N, 4.968° E Uncertainty ± 2.0 km |
| Event ID | ROB 7225 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-10-10 14:35:35 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
- 6
- Epicentral distance
- 13.3 – 75.0km
- Mean velocity, P wave
- 6.2km/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: 6 measurements, root-mean-square deviation 0.34 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)6 stations | |||||
| GESGesves | 13.3 | 140 | 12:28:09.46+2.81 s | 12:28:10.65+4.00 s | 1.19 |
| MRDMaredsous | 24.1 | 216 | 12:28:11.67+5.02 s | – | – |
| CLAClavier | 24.6 | 105 | 12:28:11.57+4.92 s | 12:28:14.68+8.03 s | 3.11 |
| DOUDourbes | 50.1 | 212 | 12:28:14.86+8.21 s | – | – |
| RQRRonquières | 54.6 | 286 | 12:28:16.10+9.45 s | – | – |
| HOUHouvegnez | 75.0 | 100 | 12:28:19.82+13.17 s | – | – |
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