DURBUY (BE)
Quarry blast23 October 2020
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 12:25:382020-10-23
- UTC
- 10:25:382020-10-23
Main parameters
| Date and time | 2020-10-23 10:25:38 UTC 2020-10-23 12:25:38 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.353° N, 5.551° E Uncertainty ± 0.8 km |
| Event ID | ROB 11150 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-10-23 14:24:26 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
- 9
- Epicentral distance
- 19.2 – 53.0km
- Mean velocity, P wave
- 5.3km/s
- Mean velocity, S wave
- 3.2km/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 0.26 s. S wave: 6 measurements, root-mean-square deviation 0.46 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 | 19.2 | 292 | 10:25:41.53+3.18 s | – | – |
| RCHRochefort | 32.0 | 226 | 10:25:44.01+5.66 s | 10:25:48.23+9.88 s | 4.22 |
| HOUHouvegnez | 32.3 | 90 | 10:25:43.92+5.57 s | – | – |
| GESGesves | 33.2 | 276 | 10:25:44.36+6.01 s | 10:25:49.16+10.81 s | 4.80 |
| MRGMont Rigi | 41.1 | 65 | 10:25:45.55+7.20 s | 10:25:50.29+11.94 s | 4.74 |
| MEMHMembach | 43.2 | 49 | 10:25:46.23+7.88 s | 10:25:51.76+13.41 s | 5.53 |
| MEMSMembach | 43.2 | 49 | 10:25:46.29+7.94 s | – | – |
| KLBKalborn | 48.8 | 125 | 10:25:47.00+8.65 s | 10:25:53.48+15.13 s | 6.48 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 53.0 | 30 | 10:25:48.66+10.31 s | 10:25:54.12+15.77 s | 5.46 |