ROCHEFORT (BE)
Quarry blast9 November 2018
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 12:38:032018-11-09
- UTC
- 11:38:032018-11-09
Main parameters
| Date and time | 2018-11-09 11:38:03 UTC 2018-11-09 12:38:03 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.180° N, 5.251° E Uncertainty ± 0.6 km |
| Event ID | ROB 7370 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-11-20 14:52:24 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
- 3.3 – 62.0km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.3km/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: 6 measurements, root-mean-square deviation 0.46 s. S wave: 4 measurements, root-mean-square deviation 0.18 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)6 stations | |||||
| RCHRochefort | 3.3 | 212 | 11:38:03.99+0.66 s | 11:38:04.31+0.98 s | 0.32 |
| GESGesves | 25.6 | 333 | 11:38:08.30+4.97 s | – | – |
| CLAClavier | 26.8 | 8 | 11:38:08.20+4.87 s | 11:38:11.71+8.38 s | 3.51 |
| MRDMaredsous | 37.0 | 292 | 11:38:11.10+7.77 s | 11:38:14.92+11.59 s | 3.82 |
| DOUDourbes | 47.9 | 259 | 11:38:11.75+8.42 s | 11:38:17.85+14.52 s | 6.10 |
| KLBKalborn | 62.0 | 98 | 11:38:14.14+10.81 s | – | – |