FLEMALLE (BE)
Quarry blast12 October 2018
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 14:03:202018-10-12
- UTC
- 12:03:202018-10-12
Main parameters
| Date and time | 2018-10-12 12:03:20 UTC 2018-10-12 14:03:20 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.588° N, 5.434° E Uncertainty ± 2.5 km |
| Event ID | ROB 7255 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-10-12 14:28:29 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
- 13.0 – 72.5km
- Mean velocity, P wave
- 5.6km/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: 8 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 | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)8 stations | |||||
| LCHLa Chartreuse | 13.0 | 64 | 12:03:22.92+2.37 s | – | – |
| CLAClavier | 21.0 | 206 | 12:03:24.11+3.56 s | – | – |
| GESGesves | 33.4 | 228 | 12:03:26.37+5.82 s | – | – |
| MEMSMembach | 40.9 | 87 | 12:03:27.34+6.79 s | – | – |
| MRGMont Rigi | 46.3 | 100 | 12:03:28.90+8.35 s | – | – |
| HOUHouvegnez | 48.2 | 123 | 12:03:29.48+8.93 s | – | – |
| MRDMaredsous | 57.0 | 236 | 12:03:30.94+10.39 s | – | – |
| KLBKalborn | 72.5 | 138 | 12:03:33.27+12.72 s | 12:03:42.14+21.59 s | 8.87 |
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