ERQUELINNES (BE)
Quarry blast24 January 2022
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:30:092022-01-24
- UTC
- 12:30:092022-01-24
Main parameters
| Date and time | 2022-01-24 12:30:09 UTC 2022-01-24 13:30:09 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.276° N, 4.125° E Uncertainty ± 1.9 km |
| Event ID | ROB 15265 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-01-24 14:24:52 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
- 12
- Epicentral distance
- 22.8 – 143.0km
- Mean velocity, P wave
- 6.8km/s
- Mean velocity, S wave
- 3.6km/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: 8 measurements, root-mean-square deviation 0.32 s. S wave: 6 measurements, root-mean-square deviation 0.35 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)11 stations | |||||
| BRQBracquegnies | 22.8 | 2 | 12:30:14.63+4.90 s | – | – |
| BDHNBois d'Haine | 27.0 | 14 | 12:30:14.51+4.78 s | 12:30:17.90+8.17 s | 3.39 |
| SNFSeneffe | 28.5 | 23 | 12:30:14.74+5.01 s | 12:30:18.78+9.05 s | 4.04 |
| RQRRonquières | 37.4 | 11 | 12:30:16.56+6.83 s | – | – |
| DOUDourbes | 39.1 | 121 | 12:30:16.39+6.66 s | 12:30:21.58+11.85 s | 5.19 |
| SKQSteenkerque | 41.6 | 356 | 12:30:17.08+7.35 s | 12:30:21.90+12.17 s | 4.82 |
| MRDMaredsous | 45.9 | 86 | 12:30:17.70+7.97 s | 12:30:24.14+14.41 s | 6.44 |
| TGATangissart | 46.2 | 37 | 12:30:17.02+7.29 s | 12:30:23.66+13.93 s | 6.64 |
| MEMHMembach | 138.9 | 74 | 12:30:33.21+23.48 s | – | – |
| MEMSMembach | 138.9 | 74 | 12:30:33.44+23.71 s | – | – |
| KLBKalborn | 143.0 | 97 | 12:30:34.07+24.34 s | 12:30:51.53+41.80 s | 17.46 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 139.1 | 66 | 12:30:33.73+24.00 s | – | – |