NAMUR (BE)
Quarry blast1 June 2018
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 11:51:532018-06-01
- UTC
- 09:51:532018-06-01
Main parameters
| Date and time | 2018-06-01 09:51:53 UTC 2018-06-01 11:51:53 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.496° N, 4.981° E Uncertainty ± 1.0 km |
| Event ID | ROB 6725 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-06-07 16:29:50 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
- 10
- Epicentral distance
- 14.5 – 91.7km
- Mean velocity, P wave
- 5.6km/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: 10 measurements, root-mean-square deviation 0.31 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 | |||||
| GESGesves | 14.5 | 149 | 09:51:55.81+1.85 s | 09:51:58.23+4.27 s | 2.42 |
| CLAClavier | 24.4 | 111 | 09:51:58.33+4.37 s | 09:52:01.78+7.82 s | 3.45 |
| MRDMaredsous | 26.4 | 215 | 09:51:58.65+4.69 s | 09:52:02.36+8.40 s | 3.71 |
| DOUDourbes | 52.4 | 212 | 09:52:03.59+9.63 s | – | – |
| RQRRonquières | 54.9 | 283 | 09:52:03.36+9.40 s | – | – |
| UCCSUccle | 55.2 | 308 | 09:52:03.56+9.60 s | – | – |
| MEMSMembach | 74.0 | 80 | 09:52:06.49+12.53 s | – | – |
| HOUHouvegnez | 74.5 | 102 | 09:52:07.33+13.37 s | – | – |
| MRGMont Rigi | 77.6 | 88 | 09:52:07.62+13.66 s | – | – |
| KLBKalborn | 91.7 | 118 | 09:52:10.14+16.18 s | – | – |
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