CHARLEROI (BE)
Quarry blast23 March 2022
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 12:51:542022-03-23
- UTC
- 11:51:542022-03-23
Main parameters
| Date and time | 2022-03-23 11:51:54 UTC 2022-03-23 12:51:54 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.405° N, 4.375° E Uncertainty ± 1.7 km |
| Event ID | ROB 15710 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-03-25 10:58:49 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
- 24.8 – 128.2km
- Mean velocity, P wave
- 9.3km/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: 4 measurements, root-mean-square deviation 0.10 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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 | |||||
| RQRRonquières | 24.8 | 335 | 11:51:59.48+4.74 s | – | – |
| MRDMaredsous | 30.2 | 112 | 11:52:00.14+5.40 s | 11:52:04.43+9.69 s | 4.29 |
| SKQSteenkerque | 34.3 | 323 | 11:52:00.70+5.96 s | 11:52:05.25+10.51 s | 4.55 |
| DOUDourbes | 37.9 | 155 | 11:52:00.82+6.08 s | 11:52:06.67+11.93 s | 5.85 |
| KLBKalborn | 128.2 | 105 | 11:52:16.35+21.61 s | 11:52:32.48+37.74 s | 16.13 |