GELBRESSEE (BE)
Quarry blast18 July 2017
- Magnitude
- 1.6ML
- Depth
- 2.7km ± 9.7
- Belgian time
- 13:46:182017-07-18
- UTC
- 11:46:182017-07-18
Main parameters
| Date and time | 2017-07-18 11:46:18 UTC 2017-07-18 13:46:18 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.507° N, 4.965° E Uncertainty ± 2.2 km |
| Depth of hypocenter | 2.7 ± 9.7 km |
| Event ID | ROB 5780 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-07-18 14:48:44 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
- 9
- Epicentral distance
- 16.1 – 78.7km
- Mean velocity, P wave
- 5.8km/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 2.7 km. P wave: 9 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)9 stations | ||||||
| GESGesves | 16.1 | 148 | 11:46:20.84+2.39 s | 11:46:23.06+4.61 s | 2.22 | – |
| CLAClavier | 25.8 | 112 | 11:46:22.75+4.30 s | – | – | – |
| MRDMaredsous | 26.8 | 212 | 11:46:23.25+4.80 s | 11:46:27.27+8.82 s | 4.02 | – |
| STISart Tilman | 43.3 | 79 | 11:46:26.42+7.97 s | – | – | – |
| SNFSeneffe | 48.3 | 271 | 11:46:26.84+8.39 s | – | – | – |
| RQRRonquières | 53.6 | 282 | 11:46:27.62+9.17 s | – | – | – |
| SKQSteenkerque | 64.7 | 284 | 11:46:29.28+10.83 s | – | – | – |
| MEMHMembach | 74.9 | 81 | 11:46:31.08+12.63 s | – | – | – |
| MRGMont Rigi | 78.7 | 89 | 11:46:32.03+13.58 s | 11:46:41.93+23.48 s | 9.90 | 13.8 |
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