DURBUY (BE)
Quarry blast15 February 2021
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 14:06:122021-02-15
- UTC
- 13:06:122021-02-15
Main parameters
| Date and time | 2021-02-15 13:06:12 UTC 2021-02-15 14:06:12 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.353° N, 5.558° E Uncertainty ± 1.5 km |
| Event ID | ROB 12440 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-02-23 23:28:26 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
- 8
- Epicentral distance
- 19.6 – 48.4km
- 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 0.50 s. S wave: 7 measurements, root-mean-square deviation 0.34 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 | 19.6 | 292 | 13:06:15.72+3.19 s | 13:06:19.12+6.59 s | 3.40 |
| HOUHouvegnez | 31.8 | 90 | 13:06:18.10+5.57 s | 13:06:22.46+9.93 s | 4.36 |
| RCHRochefort | 32.3 | 227 | 13:06:19.53+7.00 s | 13:06:21.85+9.32 s | 2.32 |
| GESGesves | 33.7 | 276 | 13:06:18.59+6.06 s | 13:06:23.20+10.67 s | 4.61 |
| MRGMont Rigi | 40.7 | 64 | 13:06:19.62+7.09 s | – | – |
| MEMHMembach | 42.9 | 48 | 13:06:19.73+7.20 s | 13:06:25.47+12.94 s | 5.74 |
| TNLTernell | 48.2 | 57 | 13:06:20.99+8.46 s | 13:06:27.56+15.03 s | 6.57 |
| KLBKalborn | 48.4 | 125 | 13:06:21.46+8.93 s | 13:06:27.23+14.70 s | 5.77 |