MARCHIN (BE)
Quarry blast28 June 2022
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 19:20:402022-06-28
- UTC
- 17:20:402022-06-28
Main parameters
| Date and time | 2022-06-28 17:20:40 UTC 2022-06-28 19:20:40 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.465° N, 5.232° E Uncertainty ± 3.2 km |
| Event ID | ROB 16540 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-07-04 14:15:45 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
- 7.2 – 74.6km
- Mean velocity, P wave
- 6.5km/s
- Mean velocity, S wave
- 3.7km/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 0.79 s. S wave: 4 measurements, root-mean-square deviation 0.59 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 | |||||
| CLAClavier | 7.2 | 136 | 17:20:42.77+2.42 s | 17:20:44.51+4.16 s | 1.74 |
| GESGesves | 13.6 | 229 | 17:20:43.17+2.82 s | 17:20:45.15+4.80 s | 1.98 |
| RCHRochefort | 34.5 | 181 | 17:20:46.30+5.95 s | 17:20:50.33+9.98 s | 4.03 |
| HOUHouvegnez | 56.3 | 102 | 17:20:48.67+8.32 s | – | – |
| TNLTernell | 65.1 | 78 | 17:20:52.35+12.00 s | – | – |
| KLBKalborn | 74.6 | 123 | 17:20:53.56+13.21 s | 17:21:01.73+21.38 s | 8.17 |