NAMUR (BE)
Quarry blast11 October 2018
- Magnitude
- 2.1ML
- Depth
- –
- Belgian time
- 14:17:512018-10-11
- UTC
- 12:17:512018-10-11
Main parameters
| Date and time | 2018-10-11 12:17:51 UTC 2018-10-11 14:17:51 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 50.491° N, 4.979° E Uncertainty ± 1.0 km |
| Event ID | ROB 7240 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-10-11 15:52:33 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
- 14.0 – 91.5km
- Mean velocity, P wave
- 5.9km/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 0.41 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 | 14.0 | 147 | 12:17:54.67+2.71 s | 12:17:56.07+4.11 s | 1.40 |
| CLAClavier | 24.3 | 109 | 12:17:56.87+4.91 s | 12:17:58.89+6.93 s | 2.02 |
| MRDMaredsous | 25.8 | 216 | 12:17:57.17+5.21 s | 12:17:59.71+7.75 s | 2.54 |
| DOUDourbes | 51.8 | 212 | 12:18:02.00+10.04 s | – | – |
| SKQSteenkerque | 66.1 | 286 | 12:18:03.11+11.15 s | – | – |
| KLBKalborn | 91.5 | 118 | 12:18:08.14+16.18 s | – | – |
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