DURBUY (BE)
Quarry blast4 June 2021
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 13:25:202021-06-04
- UTC
- 11:25:202021-06-04
Main parameters
| Date and time | 2021-06-04 11:25:20 UTC 2021-06-04 13:25:20 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.367° N, 5.553° E Uncertainty ± 0.5 km |
| Event ID | ROB 13600 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-06-08 10:22:17 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
- 8
- Epicentral distance
- 18.7 – 49.6km
- Mean velocity, P wave
- 5.9km/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: 8 measurements, root-mean-square deviation 0.14 s. S wave: 5 measurements, root-mean-square deviation 0.14 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)8 stations | |||||
| CLAClavier | 18.7 | 288 | 11:25:23.88+3.35 s | 11:25:26.70+6.17 s | 2.82 |
| HOUHouvegnez | 32.2 | 92 | 11:25:26.22+5.69 s | – | – |
| GESGesves | 33.2 | 274 | 11:25:26.63+6.10 s | – | – |
| MRGMont Rigi | 40.4 | 66 | 11:25:27.83+7.30 s | 11:25:32.80+12.27 s | 4.97 |
| MEMSMembach | 42.2 | 50 | 11:25:28.19+7.66 s | 11:25:33.28+12.75 s | 5.09 |
| MEMHMembach | 42.2 | 50 | 11:25:28.21+7.68 s | 11:25:33.43+12.90 s | 5.22 |
| TNLTernell | 47.7 | 59 | 11:25:29.15+8.62 s | – | – |
| KLBKalborn | 49.6 | 127 | 11:25:29.18+8.65 s | 11:25:35.68+15.15 s | 6.50 |