DURBUY (BE)
Quarry blast12 April 2021
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 12:52:072021-04-12
- UTC
- 10:52:072021-04-12
Main parameters
| Date and time | 2021-04-12 10:52:07 UTC 2021-04-12 12:52:07 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.362° N, 5.553° E Uncertainty ± 1.3 km |
| Event ID | ROB 13095 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-04-12 22:38:39 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
- 18.9 – 74.5km
- Mean velocity, P wave
- 5.5km/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. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 8 measurements, root-mean-square deviation 0.40 s. S wave: 8 measurements, root-mean-square deviation 0.54 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)7 stations | |||||
| CLAClavier | 18.9 | 290 | 10:52:10.13+3.13 s | 10:52:12.13+5.13 s | 2.00 |
| RCHRochefort | 32.7 | 225 | 10:52:13.14+6.14 s | 10:52:17.14+10.14 s | 4.00 |
| GESGesves | 33.2 | 275 | 10:52:13.21+6.21 s | 10:52:17.96+10.96 s | 4.75 |
| MRGMont Rigi | 40.7 | 66 | 10:52:14.33+7.33 s | 10:52:19.59+12.59 s | 5.26 |
| MEMHMembach | 42.5 | 50 | 10:52:13.69+6.69 s | 10:52:19.66+12.66 s | 5.97 |
| KLBKalborn | 49.3 | 126 | 10:52:15.83+8.83 s | 10:52:21.66+14.66 s | 5.83 |
| DOUDourbes | 74.5 | 247 | 10:52:20.72+13.72 s | 10:52:28.96+21.96 s | 8.24 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 52.2 | 31 | 10:52:16.59+9.59 s | 10:52:23.57+16.57 s | 6.98 |