ROCHEFORT (BE)
Quarry blast16 April 2021
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 12:18:322021-04-16
- UTC
- 10:18:322021-04-16
Main parameters
| Date and time | 2021-04-16 10:18:32 UTC 2021-04-16 12:18:32 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.189° N, 5.244° E |
| Event ID | ROB 13170 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-04-16 17:55:06 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
- 4.0 – 36.2km
- Mean velocity, P wave
- 5.6km/s
- Mean velocity, S wave
- 3.2km/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 0.04 s. S wave: 4 measurements, root-mean-square deviation 0.04 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 | 4.0 | 197 | 10:18:32.81+0.79 s | 10:18:33.40+1.38 s | 0.59 |
| GESGesves | 24.5 | 333 | 10:18:36.45+4.43 s | 10:18:39.62+7.60 s | 3.17 |
| CLAClavier | 25.9 | 9 | 10:18:36.80+4.78 s | 10:18:40.12+8.10 s | 3.32 |
| MRDMaredsous | 36.2 | 290 | 10:18:38.52+6.50 s | 10:18:43.33+11.31 s | 4.81 |