ROCHEFORT (BE)
Quarry blast19 February 2018
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 12:26:142018-02-19
- UTC
- 11:26:142018-02-19
Main parameters
| Date and time | 2018-02-19 11:26:14 UTC 2018-02-19 12:26:14 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.186° N, 5.242° E Uncertainty ± 0.6 km |
| Event ID | ROB 6335 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-02-19 13:28:46 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
- 24.8 – 117.1km
- 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 0.16 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 | 24.8 | 334 | 11:26:18.62+4.54 s | 11:26:21.73+7.65 s | 3.11 |
| CLAClavier | 26.3 | 9 | 11:26:18.76+4.68 s | 11:26:22.39+8.31 s | 3.63 |
| DOUDourbes | 47.3 | 258 | 11:26:22.43+8.35 s | 11:26:28.52+14.44 s | 6.09 |
| KLBKalborn | 62.7 | 98 | 11:26:24.62+10.54 s | – | – |
| WLFWalferdange | 87.4 | 131 | 11:26:29.27+15.19 s | – | – |
| DSLBDessel | 117.1 | 354 | 11:26:34.17+20.09 s | – | – |
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