BIRRESBORN (DE)
Quarry blast21 January 2022
- Magnitude
- 2.1ML
- Depth
- –
- Belgian time
- 14:00:032022-01-21
- UTC
- 13:00:032022-01-21
Main parameters
| Date and time | 2022-01-21 13:00:03 UTC 2022-01-21 14:00:03 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 50.167° N, 6.673° E Uncertainty ± 0.8 km |
| Event ID | ROB 15250 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-01-21 14:54:42 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
- 41.0 – 84.8km
- Mean velocity, P wave
- 6.0km/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 0.14 s. S wave: 4 measurements, root-mean-square deviation 0.17 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)4 stations | |||||
| KLBKalborn | 41.0 | 260 | 13:00:10.57+7.12 s | 13:00:15.93+12.48 s | 5.36 |
| VIAVianden | 42.5 | 233 | 13:00:10.94+7.49 s | 13:00:16.55+13.10 s | 5.61 |
| MRGMont Rigi | 57.3 | 312 | 13:00:13.10+9.65 s | 13:00:20.57+17.12 s | 7.47 |
| MEMHMembach | 68.1 | 316 | 13:00:15.33+11.88 s | 13:00:24.23+20.78 s | 8.90 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 84.8 | 322 | 13:00:17.89+14.44 s | – | – |