GELBRESSEE (BE)
Quarry blast22 September 2017
- Magnitude
- 1.4ML
- Depth
- 1.7km ± 6.7
- Belgian time
- 14:08:092017-09-22
- UTC
- 12:08:092017-09-22
Main parameters
| Date and time | 2017-09-22 12:08:09 UTC 2017-09-22 14:08:09 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.515° N, 4.958° E Uncertainty ± 2.3 km |
| Depth of hypocenter | 1.7 ± 6.7 km |
| Event ID | ROB 5905 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-09-22 15:40:04 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
- 17.1 – 94.1km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.2km/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 1.7 km. P wave: 8 measurements, root-mean-square deviation 0.20 s. S wave: 4 measurements, root-mean-square deviation 0.25 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)8 stations | ||||||
| GESGesves | 17.1 | 148 | 12:08:12.10+2.42 s | 12:08:14.41+4.73 s | 2.31 | – |
| CLAClavier | 26.6 | 114 | 12:08:13.95+4.27 s | – | – | – |
| MRDMaredsous | 27.3 | 210 | 12:08:14.42+4.74 s | – | – | – |
| RCHRochefort | 44.4 | 154 | 12:08:16.88+7.20 s | 12:08:23.41+13.73 s | 6.53 | – |
| DOUDourbes | 53.4 | 209 | 12:08:19.00+9.32 s | 12:08:25.55+15.87 s | 6.55 | 12.1 |
| SKQSteenkerque | 64.0 | 284 | 12:08:20.73+11.05 s | – | – | – |
| HOUHouvegnez | 76.5 | 103 | 12:08:23.00+13.32 s | 12:08:33.05+23.37 s | 10.05 | – |
| KLBKalborn | 94.1 | 119 | 12:08:25.81+16.13 s | – | – | – |
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