NAMUR (BE)
Quarry blast8 May 2018
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 14:14:172018-05-08
- UTC
- 12:14:172018-05-08
Main parameters
| Date and time | 2018-05-08 12:14:17 UTC 2018-05-08 14:14:17 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.500° N, 4.980° E Uncertainty ± 1.4 km |
| Event ID | ROB 6580 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-05-08 14:21:23 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
- 14.9 – 91.9km
- Mean velocity, P wave
- 5.7km/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 0.27 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 | 14.9 | 149 | 12:14:19.28+2.27 s | – | – |
| CLAClavier | 24.6 | 111 | 12:14:21.15+4.14 s | 12:14:24.40+7.39 s | 3.25 |
| MRDMaredsous | 26.7 | 214 | 12:14:21.70+4.69 s | 12:14:25.79+8.78 s | 4.09 |
| LCHLa Chartreuse | 46.5 | 70 | 12:14:25.48+8.47 s | – | – |
| DOUDourbes | 52.8 | 211 | 12:14:26.42+9.41 s | – | – |
| RQRRonquières | 54.8 | 283 | 12:14:26.78+9.77 s | – | – |
| SKQSteenkerque | 65.9 | 285 | 12:14:27.86+10.85 s | – | – |
| MEMSMembach | 74.0 | 80 | 12:14:29.94+12.93 s | – | – |
| MRGMont Rigi | 77.7 | 89 | 12:14:30.48+13.47 s | – | – |
| KLBKalborn | 91.9 | 119 | 12:14:33.11+16.10 s | – | – |
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