FONTAINE-L EVEQUE (BE)
Quarry blast4 August 2021
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 13:01:022021-08-04
- UTC
- 11:01:022021-08-04
Main parameters
| Date and time | 2021-08-04 11:01:02 UTC 2021-08-04 13:01:02 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.404° N, 4.335° E Uncertainty ± 2.5 km |
| Event ID | ROB 14185 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-08-06 18:29:51 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
- 12.4 – 39.1km
- Mean velocity, P wave
- 6.4km/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: 4 measurements, root-mean-square deviation 0.44 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 | |||||
| SNFSeneffe | 12.4 | 343 | 11:01:05.10+2.58 s | – | – |
| TGATangissart | 26.0 | 31 | 11:01:07.10+4.58 s | 11:01:10.72+8.20 s | 3.62 |
| BOUBougnies | 27.7 | 267 | 11:01:08.44+5.92 s | – | – |
| DOUDourbes | 39.1 | 152 | 11:01:09.17+6.65 s | 11:01:14.80+12.28 s | 5.63 |
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