COUVIN (BE)
Quarry blast23 August 2022
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 12:13:122022-08-23
- UTC
- 10:13:122022-08-23
Main parameters
| Date and time | 2022-08-23 10:13:12 UTC 2022-08-23 12:13:12 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.078° N, 4.457° E Uncertainty ± 4.5 km |
| Event ID | ROB 16930 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-08-26 15:01:28 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
- 10.0 – 118.2km
- 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: 5 measurements, root-mean-square deviation 0.65 s. S wave: 4 measurements, root-mean-square deviation 0.23 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 | |||||
| DOUDourbes | 10.0 | 79 | 10:13:14.35+1.54 s | 10:13:16.27+3.46 s | 1.92 |
| MRDMaredsous | 33.4 | 42 | 10:13:18.70+5.89 s | 10:13:23.03+10.22 s | 4.33 |
| GESGesves | 56.4 | 52 | 10:13:21.40+8.59 s | 10:13:30.12+17.31 s | 8.72 |
| CLAClavier | 71.2 | 57 | 10:13:25.93+13.12 s | 10:13:34.29+21.48 s | 8.36 |
| KLBKalborn | 118.2 | 88 | 10:13:33.33+20.52 s | – | – |