BRAINE-LE-COMTE (BE)
Quarry blast7 August 2020
- Magnitude
- 0.8ML
- Depth
- –
- Belgian time
- 13:56:412020-08-07
- UTC
- 11:56:412020-08-07
Main parameters
| Date and time | 2020-08-07 11:56:41 UTC 2020-08-07 13:56:41 Belgian time |
|---|---|
| Magnitude | ML 0.8 |
| Epicentral coordinates | 50.595° N, 4.122° E Uncertainty ± 0.6 km |
| Event ID | ROB 10635 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-08-10 12:03:59 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
- 6.7 – 28.4km
- Mean velocity, P wave
- 5.7km/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 0.11 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 | 6.7 | 334 | 11:56:42.25+1.22 s | 11:56:43.41+2.38 s | 1.16 |
| RQRRonquières | 7.4 | 80 | 11:56:42.54+1.51 s | 11:56:43.76+2.73 s | 1.22 |
| BRQBracquegnies | 12.7 | 175 | 11:56:43.46+2.43 s | – | – |
| BOUBougnies | 26.1 | 209 | 11:56:45.88+4.85 s | – | – |
| TGATangissart | 28.4 | 88 | 11:56:46.00+4.97 s | 11:56:49.50+8.47 s | 3.50 |
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