ROCHEFORT (BE)
Quarry blast26 January 2022
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 12:18:592022-01-26
- UTC
- 11:18:592022-01-26
Main parameters
| Date and time | 2022-01-26 11:18:59 UTC 2022-01-26 12:18:59 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.158° N, 5.261° E Uncertainty ± 3.0 km |
| Event ID | ROB 15435 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-02-11 11:17:53 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
- 2.4 – 61.0km
- Mean velocity, P wave
- 5.8km/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 0.12 s. S wave: 6 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)6 stations | |||||
| RCHRochefort | 2.4 | 262 | 11:18:59.92+0.28 s | 11:19:00.22+0.58 s | 0.30 |
| GESGesves | 28.1 | 334 | 11:19:04.62+4.98 s | 11:19:08.36+8.72 s | 3.74 |
| CLAClavier | 29.2 | 6 | 11:19:04.85+5.21 s | 11:19:08.70+9.06 s | 3.85 |
| MRDMaredsous | 38.6 | 295 | 11:19:06.40+6.76 s | 11:19:11.26+11.62 s | 4.86 |
| DOUDourbes | 48.1 | 262 | 11:19:08.20+8.56 s | 11:19:14.42+14.78 s | 6.22 |
| KLBKalborn | 61.0 | 96 | 11:19:10.14+10.50 s | 11:19:17.62+17.98 s | 7.48 |