SOIGNIES (BE)
Quarry blast20 April 2017
- Magnitude
- 1.3ML
- Depth
- 7.3km ± 3.5
- Belgian time
- 14:01:242017-04-20
- UTC
- 12:01:242017-04-20
Main parameters
| Date and time | 2017-04-20 12:01:24 UTC 2017-04-20 14:01:24 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.580° N, 4.048° E Uncertainty ± 1.6 km |
| Depth of hypocenter | 7.3 ± 3.5 km |
| Event ID | ROB 5676 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2017-04-20 14:39:58 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
- 8.0 – 22.5km
- 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. Hypocenter at a depth of 7.3 km. P wave: 5 measurements, root-mean-square deviation 0.12 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 | nm | |
|---|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)5 stations | ||||||
| SKQSteenkerque | 8.0 | 16 | 12:01:26.80+1.96 s | 12:01:28.12+3.28 s | 1.32 | 43.8 |
| BRQBracquegnies | 12.7 | 150 | 12:01:27.15+2.31 s | – | – | – |
| RQRRonquières | 12.9 | 77 | 12:01:27.44+2.60 s | 12:01:29.31+4.47 s | 1.87 | – |
| SNFSeneffe | 18.4 | 115 | 12:01:28.33+3.49 s | – | – | – |
| BOUBougnies | 22.5 | 199 | 12:01:29.14+4.30 s | – | – | – |
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