DURBUY (BE)
Quarry blast23 July 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 14:20:472020-07-23
- UTC
- 12:20:472020-07-23
Main parameters
| Date and time | 2020-07-23 12:20:47 UTC 2020-07-23 14:20:47 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.358° N, 5.558° E Uncertainty ± 1.3 km |
| Event ID | ROB 10535 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-07-23 15:13:03 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
- 7
- Epicentral distance
- 19.4 – 74.7km
- Mean velocity, P wave
- 5.8km/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: 7 measurements, root-mean-square deviation 0.46 s. S wave: 7 measurements, root-mean-square deviation 0.42 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 | 19.4 | 291 | 12:20:50.81+3.22 s | 12:20:54.18+6.59 s | 3.37 |
| HOUHouvegnez | 31.8 | 91 | 12:20:53.31+5.72 s | 12:20:58.08+10.49 s | 4.77 |
| RCHRochefort | 32.7 | 226 | 12:20:53.45+5.86 s | 12:20:57.31+9.72 s | 3.86 |
| GESGesves | 33.6 | 275 | 12:20:53.62+6.03 s | 12:20:58.31+10.72 s | 4.69 |
| MEMHMembach | 42.5 | 49 | 12:20:54.31+6.72 s | 12:21:00.86+13.27 s | 6.55 |
| KLBKalborn | 48.7 | 126 | 12:20:56.30+8.71 s | 12:21:02.26+14.67 s | 5.96 |
| DOUDourbes | 74.7 | 247 | 12:21:01.44+13.85 s | 12:21:09.77+22.18 s | 8.33 |