ROCHEFORT (BE)
Quarry blast16 January 2019
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 12:26:402019-01-16
- UTC
- 11:26:402019-01-16
Main parameters
| Date and time | 2019-01-16 11:26:40 UTC 2019-01-16 12:26:40 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.181° N, 5.247° E Uncertainty ± 0.8 km |
| Event ID | ROB 7640 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-01-16 15:39:33 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
- 3.2 – 72.2km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.4km/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: 9 measurements, root-mean-square deviation 0.21 s. S wave: 7 measurements, root-mean-square deviation 0.33 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)9 stations | |||||
| RCHRochefort | 3.2 | 207 | 11:26:40.55+0.52 s | 11:26:41.09+1.06 s | 0.54 |
| GESGesves | 25.4 | 333 | 11:26:44.66+4.63 s | 11:26:48.13+8.10 s | 3.47 |
| CLAClavier | 26.8 | 8 | 11:26:44.85+4.82 s | 11:26:48.57+8.54 s | 3.72 |
| MRDMaredsous | 36.7 | 292 | 11:26:46.71+6.68 s | 11:26:51.22+11.19 s | 4.51 |
| DOUDourbes | 47.6 | 259 | 11:26:48.77+8.74 s | 11:26:54.32+14.29 s | 5.55 |
| HOUHouvegnez | 57.4 | 70 | 11:26:50.21+10.18 s | 11:26:57.04+17.01 s | 6.83 |
| KLBKalborn | 62.3 | 98 | 11:26:50.86+10.83 s | – | – |
| MEMSMembach | 72.2 | 48 | 11:26:53.13+13.10 s | – | – |
| MEMHMembach | 72.2 | 48 | 11:26:53.13+13.10 s | 11:27:00.74+20.71 s | 7.61 |