SOIGNIES (BE)
Quarry blast23 July 2020
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 12:51:592020-07-23
- UTC
- 10:51:592020-07-23
Main parameters
| Date and time | 2020-07-23 10:51:59 UTC 2020-07-23 12:51:59 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.532° N, 4.012° E Uncertainty ± 2.3 km |
| Event ID | ROB 10525 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-07-23 15:12:22 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
- 5
- Epicentral distance
- 13.8 – 78.1km
- Mean velocity, P wave
- 5.3km/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: 5 measurements, root-mean-square deviation 0.61 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)5 stations | |||||
| SKQSteenkerque | 13.8 | 20 | 10:52:02.93+3.53 s | 10:52:03.57+4.17 s | 0.64 |
| BOUBougnies | 16.6 | 197 | 10:52:02.57+3.17 s | – | – |
| RQRRonquières | 17.2 | 61 | 10:52:03.25+3.85 s | – | – |
| UCCSUccle | 38.4 | 40 | 10:52:05.90+6.50 s | – | – |
| GESGesves | 78.1 | 102 | 10:52:14.89+15.49 s | – | – |
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