CHANLY (BE)
Quarry blast20 February 2018
- Magnitude
- 0.9ML
- Depth
- 1.2km ± 4.9
- Belgian time
- 16:40:022018-02-20
- UTC
- 15:40:022018-02-20
Main parameters
| Date and time | 2018-02-20 15:40:02 UTC 2018-02-20 16:40:02 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.077° N, 5.160° E Uncertainty ± 1.8 km |
| Depth of hypocenter | 1.2 ± 4.9 km |
| Event ID | ROB 6345 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-02-21 10:16:29 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
- 10.0 – 99.8km
- Mean velocity, P wave
- 5.5km/s
- Mean velocity, S wave
- 3.3km/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. Hypocenter at a depth of 1.2 km. P wave: 10 measurements, root-mean-square deviation 0.25 s. S wave: 5 measurements, root-mean-square deviation 0.17 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)10 stations | ||||||
| RCHRochefort | 10.0 | 29 | 15:40:04.04+1.25 s | – | – | – |
| GESGesves | 34.7 | 351 | 15:40:08.63+5.84 s | 15:40:12.96+10.17 s | 4.33 | – |
| MRDMaredsous | 37.6 | 312 | 15:40:09.17+6.38 s | 15:40:13.84+11.05 s | 4.67 | – |
| CLAClavier | 39.4 | 15 | 15:40:09.19+6.40 s | 15:40:14.51+11.72 s | 5.32 | 5.3 |
| DOUDourbes | 40.5 | 273 | 15:40:09.81+7.02 s | 15:40:14.63+11.84 s | 4.82 | – |
| HOUHouvegnez | 67.8 | 63 | 15:40:14.35+11.56 s | – | – | – |
| MEMHMembach | 84.7 | 45 | 15:40:17.89+15.10 s | – | – | – |
| WLFWalferdange | 84.8 | 122 | 15:40:17.29+14.50 s | – | – | – |
| TNLTernell | 89.4 | 50 | 15:40:18.85+16.06 s | – | – | – |
| SKQSteenkerque | 99.8 | 310 | 15:40:20.82+18.03 s | 15:40:32.29+29.50 s | 11.47 | – |
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