ROCHEFORT (BE)
Quarry blast23 February 2022
- Magnitude
- 1.9ML
- Depth
- 12.0km ± 1.8
- Belgian time
- 11:51:582022-02-23
- UTC
- 10:51:582022-02-23
Main parameters
| Date and time | 2022-02-23 10:51:58 UTC 2022-02-23 11:51:58 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.123° N, 5.188° E Uncertainty ± 2.1 km |
| Depth of hypocenter | 12.0 ± 1.8 km |
| Event ID | ROB 15590 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2022-03-08 09:41:46 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
- 4
- Epicentral distance
- 4.6 – 66.0km
- Mean velocity, P wave
- 5.2km/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. Hypocenter at a depth of 12.0 km. P wave: 4 measurements, root-mean-square deviation 0.31 s. S wave: 4 measurements, root-mean-square deviation 0.52 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 | |||||
| RCHRochefort | 4.6 | 38 | 10:51:59.63+1.50 s | 10:52:00.42+2.29 s | 0.79 |
| GESGesves | 30.0 | 346 | 10:52:03.96+5.83 s | 10:52:07.86+9.73 s | 3.90 |
| CLAClavier | 34.0 | 14 | 10:52:04.23+6.10 s | 10:52:08.35+10.22 s | 4.12 |
| KLBKalborn | 66.0 | 92 | 10:52:09.76+11.63 s | 10:52:17.63+19.50 s | 7.87 |
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