GELBRESSEE (BE)
Quarry blast23 July 2019
- Magnitude
- 1.4ML
- Depth
- 6.4km ± 8.6
- Belgian time
- 13:45:242019-07-23
- UTC
- 11:45:242019-07-23
Main parameters
| Date and time | 2019-07-23 11:45:24 UTC 2019-07-23 13:45:24 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.519° N, 4.959° E Uncertainty ± 2.0 km |
| Depth of hypocenter | 6.4 ± 8.6 km |
| Event ID | ROB 8410 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-07-23 14:15:11 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
- 17.4 – 94.2km
- Mean velocity, P wave
- 5.7km/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 6.4 km. P wave: 10 measurements, root-mean-square deviation 0.50 s. S wave: 4 measurements, root-mean-square deviation 0.28 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 | ||||||
| GESGesves | 17.4 | 148 | 11:45:26.56+2.46 s | – | – | – |
| CLAClavier | 26.7 | 114 | 11:45:28.66+4.56 s | 11:45:32.31+8.21 s | 3.65 | 24.4 |
| MRDMaredsous | 27.6 | 209 | 11:45:29.15+5.05 s | – | – | – |
| RCHRochefort | 44.7 | 155 | 11:45:31.65+7.55 s | 11:45:37.25+13.15 s | 5.60 | – |
| RQRRonquières | 52.9 | 281 | 11:45:32.04+7.94 s | – | – | – |
| DOUDourbes | 53.8 | 209 | 11:45:34.09+9.99 s | 11:45:40.12+16.02 s | 6.03 | – |
| SKQSteenkerque | 63.9 | 283 | 11:45:34.48+10.38 s | 11:45:43.80+19.70 s | 9.32 | – |
| MEMHMembach | 75.1 | 82 | 11:45:36.73+12.63 s | – | – | – |
| HOUHouvegnez | 76.5 | 103 | 11:45:37.40+13.30 s | – | – | – |
| KLBKalborn | 94.2 | 119 | 11:45:40.31+16.21 s | – | – | – |
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