AUBRIVES (FR)
Quarry blast14 October 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 12:01:402020-10-14
- UTC
- 10:01:402020-10-14
Main parameters
| Date and time | 2020-10-14 10:01:40 UTC 2020-10-14 12:01:40 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.080° N, 4.800° E Uncertainty ± 0.9 km |
| Event ID | ROB 11070 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-10-15 11:43:00 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
- 4
- Epicentral distance
- 14.8 – 39.7km
- Mean velocity, P wave
- 6.3km/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: 4 measurements, root-mean-square deviation 0.19 s. S wave: 4 measurements, root-mean-square deviation 0.10 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)4 stations | |||||
| DOUDourbes | 14.8 | 277 | 10:01:43.05+2.90 s | 10:01:45.18+5.03 s | 2.13 |
| MRDMaredsous | 24.9 | 355 | 10:01:44.43+4.28 s | 10:01:48.25+8.10 s | 3.82 |
| RCHRochefort | 31.7 | 74 | 10:01:46.05+5.90 s | 10:01:50.01+9.86 s | 3.96 |
| GESGesves | 39.7 | 31 | 10:01:47.02+6.87 s | 10:01:52.36+12.21 s | 5.34 |