DURBUY (BE)
Quarry blast22 March 2021
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 15:46:342021-03-22
- UTC
- 14:46:342021-03-22
Main parameters
| Date and time | 2021-03-22 14:46:34 UTC 2021-03-22 15:46:34 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.358° N, 5.557° E Uncertainty ± 2.6 km |
| Event ID | ROB 12815 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-22 19:42:45 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
- 10
- Epicentral distance
- 19.4 – 65.8km
- Mean velocity, P wave
- 5.4km/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: 9 measurements, root-mean-square deviation 0.41 s. S wave: 6 measurements, root-mean-square deviation 0.38 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)9 stations | |||||
| CLAClavier | 19.4 | 291 | 14:46:37.04+3.01 s | 14:46:39.73+5.70 s | 2.69 |
| HOUHouvegnez | 31.9 | 91 | 14:46:39.40+5.37 s | – | – |
| RCHRochefort | 32.6 | 226 | 14:46:40.06+6.03 s | 14:46:43.62+9.59 s | 3.56 |
| GESGesves | 33.6 | 275 | 14:46:39.82+5.79 s | 14:46:44.55+10.52 s | 4.73 |
| MRGMont Rigi | 40.6 | 65 | 14:46:41.24+7.21 s | – | – |
| MEMSMembach | 42.6 | 49 | 14:46:41.24+7.21 s | 14:46:47.22+13.19 s | 5.98 |
| KLBKalborn | 48.7 | 126 | 14:46:42.51+8.48 s | 14:46:48.44+14.41 s | 5.93 |
| MRDMaredsous | 56.5 | 264 | 14:46:45.25+11.22 s | – | – |
| VIAVianden | 65.8 | 135 | – | 14:46:53.28+19.25 s | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 52.4 | 30 | 14:46:43.30+9.27 s | – | – |