SOIGNIES (BE)
Quarry blast7 May 2021
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 11:58:442021-05-07
- UTC
- 09:58:442021-05-07
Main parameters
| Date and time | 2021-05-07 09:58:44 UTC 2021-05-07 11:58:44 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.579° N, 3.972° E Uncertainty ± 2.0 km |
| Event ID | ROB 13355 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-07 16:36:33 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
- 10.9 – 82.0km
- Mean velocity, P wave
- 6.1km/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 0.27 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 | |||||
| SKQSteenkerque | 10.9 | 44 | 09:58:47.10+2.45 s | 09:58:48.55+3.90 s | 1.45 |
| BRQBracquegnies | 15.9 | 133 | 09:58:47.56+2.91 s | – | – |
| RQRRonquières | 18.2 | 80 | 09:58:48.10+3.45 s | 09:58:50.27+5.62 s | 2.17 |
| SNFSeneffe | 23.4 | 109 | 09:58:49.27+4.62 s | 09:58:52.23+7.58 s | 2.96 |
| UCCBUccle | 36.6 | 48 | 09:58:50.55+5.90 s | – | – |
| TGATangissart | 39.1 | 86 | 09:58:51.52+6.87 s | – | – |
| GESGesves | 82.0 | 105 | 09:58:58.73+14.08 s | – | – |
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