SPRIMONT (BE)
Quarry blast1 June 2021
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 13:32:102021-06-01
- UTC
- 11:32:102021-06-01
Main parameters
| Date and time | 2021-06-01 11:32:10 UTC 2021-06-01 13:32:10 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.542° N, 5.713° E Uncertainty ± 1.3 km |
| Event ID | ROB 13575 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-06-02 08:46:26 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
- 13.5 – 29.9km
- Mean velocity, P wave
- 6.5km/s
- Mean velocity, S wave
- 3.4km/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 0.28 s. S wave: 4 measurements, root-mean-square deviation 0.15 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)3 stations | |||||
| LCHLa Chartreuse | 13.5 | 323 | 11:32:13.29+2.66 s | 11:32:15.24+4.61 s | 1.95 |
| MRGMont Rigi | 25.9 | 97 | 11:32:15.35+4.72 s | 11:32:19.06+8.43 s | 3.71 |
| TNLTernell | 29.9 | 80 | 11:32:15.42+4.79 s | 11:32:20.01+9.38 s | 4.59 |
| Dutch seismic network (KNMI)2 stations | |||||
| TERZTerziet | 27.5 | 30 | 11:32:15.81+5.18 s | 11:32:19.11+8.48 s | 3.30 |
| HGNHeimansgroeve | 29.1 | 32 | 11:32:16.02+5.39 s | – | – |