NAMUR (BE)
Quarry blast7 June 2018
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 13:48:512018-06-07
- UTC
- 11:48:512018-06-07
Main parameters
| Date and time | 2018-06-07 11:48:51 UTC 2018-06-07 13:48:51 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.511° N, 4.960° E Uncertainty ± 1.2 km |
| Event ID | ROB 6705 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-06-07 16:27:19 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
- 8
- Epicentral distance
- 16.6 – 93.7km
- 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: 8 measurements, root-mean-square deviation 0.30 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 | |||||
| GESGesves | 16.6 | 147 | 11:48:54.03+2.67 s | 11:48:55.86+4.50 s | 1.83 |
| CLAClavier | 26.3 | 113 | 11:48:55.95+4.59 s | 11:48:59.34+7.98 s | 3.39 |
| MRDMaredsous | 26.9 | 211 | 11:48:56.18+4.82 s | 11:49:00.17+8.81 s | 3.99 |
| RQRRonquières | 53.2 | 282 | 11:49:00.55+9.19 s | – | – |
| SKQSteenkerque | 64.2 | 284 | 11:49:02.37+11.01 s | – | – |
| MEMSMembach | 75.2 | 81 | 11:49:04.50+13.14 s | – | – |
| HOUHouvegnez | 76.2 | 103 | 11:49:05.46+14.10 s | – | – |
| KLBKalborn | 93.7 | 119 | 11:49:07.54+16.18 s | – | – |
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