PROFONDEVILLE (BE)
Quarry blast11 May 2021
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 10:12:012021-05-11
- UTC
- 08:12:012021-05-11
Main parameters
| Date and time | 2021-05-11 08:12:01 UTC 2021-05-11 10:12:01 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.374° N, 4.882° E Uncertainty ± 4.0 km |
| Event ID | ROB 13405 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-11 17:07:01 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
- 11.4 – 37.2km
- Mean velocity, P wave
- 5.2km/s
- Mean velocity, S wave
- 3.1km/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 0.28 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 | |||||
| MRDMaredsous | 11.4 | 225 | 08:12:03.68+2.04 s | 08:12:04.97+3.33 s | 1.29 |
| GESGesves | 14.6 | 85 | 08:12:04.21+2.57 s | 08:12:06.60+4.96 s | 2.39 |
| CLAClavier | 30.3 | 80 | 08:12:07.28+5.64 s | 08:12:11.04+9.40 s | 3.76 |
| DOUDourbes | 37.2 | 214 | 08:12:08.66+7.02 s | 08:12:13.81+12.17 s | 5.15 |