SOIGNIES (BE)
Quarry blast5 July 2021
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 12:58:362021-07-05
- UTC
- 10:58:362021-07-05
Main parameters
| Date and time | 2021-07-05 10:58:36 UTC 2021-07-05 12:58:36 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.583° N, 4.067° E Uncertainty ± 1.6 km |
| Event ID | ROB 13875 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-07-06 17:06:21 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
- 6
- Epicentral distance
- 7.4 – 66.0km
- Mean velocity, P wave
- 5.4km/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: 6 measurements, root-mean-square deviation 0.16 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)6 stations | |||||
| SKQSteenkerque | 7.4 | 7 | 10:58:37.86+1.36 s | 10:58:39.11+2.61 s | 1.25 |
| RQRRonquières | 11.5 | 77 | 10:58:38.83+2.33 s | – | – |
| BRQBracquegnies | 12.3 | 157 | 10:58:38.92+2.42 s | – | – |
| SNFSeneffe | 17.3 | 117 | 10:58:39.83+3.33 s | – | – |
| TGATangissart | 32.3 | 85 | 10:58:42.23+5.73 s | 10:58:46.52+10.02 s | 4.29 |
| DOUDourbes | 66.0 | 145 | 10:58:48.94+12.44 s | 10:58:56.20+19.70 s | 7.26 |
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