HAMOIS (BE)
Suspected quarry blast3 August 2017
- Magnitude
- 1.8ML
- Depth
- 5.0km
- Belgian time
- 13:48:482017-08-03
- UTC
- 11:48:482017-08-03
Main parameters
| Date and time | 2017-08-03 11:48:48 UTC 2017-08-03 13:48:48 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.319° N, 5.101° E Uncertainty ± 5.1 km |
| Depth of hypocenter | 5.0 km |
| Event ID | ROB 5825 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-08-03 13:52:57 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
- 7.4 – 104.8km
- Mean velocity, P wave
- 4.8km/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 5.0 km. P wave: 6 measurements, root-mean-square deviation 1.96 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)5 stations | |||||
| GESGesves | 7.4 | 352 | 11:48:47.94−0.53 s | – | – |
| CLAClavier | 18.1 | 52 | 11:48:50.59+2.12 s | – | – |
| MRDMaredsous | 23.8 | 265 | 11:48:50.59+2.12 s | – | – |
| RQRRonquières | 69.9 | 297 | 11:49:04.22+15.75 s | – | – |
| WLFWalferdange | 104.8 | 134 | 11:49:08.04+19.57 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 76.9 | 50 | 11:48:59.01+10.54 s | – | – |
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