MARCHE-EN-FAMENNE (BE)
Quarry blast23 January 2018
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 12:36:202018-01-23
- UTC
- 11:36:202018-01-23
Main parameters
| Date and time | 2018-01-23 11:36:20 UTC 2018-01-23 12:36:20 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.190° N, 5.251° E Uncertainty ± 1.3 km |
| Event ID | ROB 6255 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-01-23 13:38:10 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
- 5
- Epicentral distance
- 24.6 – 62.1km
- Mean velocity, P wave
- 6.3km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 5 measurements, root-mean-square deviation 0.05 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 | 24.6 | 332 | 11:36:25.31+4.87 s | 11:36:28.12+7.68 s | 2.81 |
| CLAClavier | 25.7 | 8 | 11:36:25.40+4.96 s | 11:36:28.21+7.77 s | 2.81 |
| MRDMaredsous | 36.7 | 290 | 11:36:27.11+6.67 s | – | – |
| DOUDourbes | 48.1 | 258 | 11:36:28.92+8.48 s | – | – |
| KLBKalborn | 62.1 | 99 | 11:36:31.27+10.83 s | – | – |
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