ENGHIEN (BE)
Quarry blast30 October 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 14:51:242020-10-30
- UTC
- 13:51:242020-10-30
Main parameters
| Date and time | 2020-10-30 13:51:24 UTC 2020-10-30 14:51:24 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.711° N, 4.081° E Uncertainty ± 4.7 km |
| Event ID | ROB 11220 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-10-31 12:25:29 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
- 6.9 – 26.5km
- Mean velocity, P wave
- 5.8km/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 0.58 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 | |||||
| SKQSteenkerque | 6.9 | 181 | 13:51:25.98+1.36 s | 13:51:26.93+2.31 s | 0.95 |
| RQRRonquières | 15.5 | 139 | 13:51:27.60+2.98 s | – | – |
| UCCBUccle | 21.9 | 64 | 13:51:27.52+2.90 s | 13:51:31.62+7.00 s | 4.10 |
| SNFSeneffe | 26.5 | 147 | 13:51:29.89+5.27 s | – | – |
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