CELLES (BE)
Quarry blast22 June 2020
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 13:03:232020-06-22
- UTC
- 11:03:232020-06-22
Main parameters
| Date and time | 2020-06-22 11:03:23 UTC 2020-06-22 13:03:23 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.665° N, 3.480° E Uncertainty ± 8.8 km |
| Event ID | ROB 10320 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-06-22 13:18:43 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
- 8
- Epicentral distance
- 42.5 – 132.0km
- Mean velocity, P wave
- 6.0km/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 0.12 s.
Stations farther than 120 km are left out of the fit: the first waves to reach them have travelled beneath the crust, through the mantle, where they propagate faster.
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)8 stations | |||||
| SKQSteenkerque | 42.5 | 92 | 11:03:31.33+7.60 s | 11:03:36.91+13.18 s | 5.58 |
| BOUBougnies | 45.0 | 133 | 11:03:31.63+7.90 s | – | – |
| BRQBracquegnies | 50.8 | 113 | 11:03:32.59+8.86 s | – | – |
| UCCBUccle | 63.8 | 76 | 11:03:34.58+10.85 s | – | – |
| TGATangissart | 74.0 | 95 | 11:03:36.63+12.90 s | 11:03:45.73+22.00 s | 9.10 |
| DOUDourbes | 101.5 | 128 | 11:03:41.24+17.51 s | 11:03:53.66+29.93 s | 12.42 |
| GESGesves | 118.1 | 105 | 11:03:43.85+20.12 s | – | – |
| CLAClavier | 132.0 | 101 | 11:03:45.22+21.49 s | – | – |