CELLES (BE)
Quarry blast14 June 2021
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 13:00:212021-06-14
- UTC
- 11:00:212021-06-14
Main parameters
| Date and time | 2021-06-14 11:00:21 UTC 2021-06-14 13:00:21 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.689° N, 3.486° E Uncertainty ± 5.5 km |
| Event ID | ROB 13670 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-06-14 16:05:58 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
- 9
- Epicentral distance
- 42.2 – 102.9km
- Mean velocity, P wave
- 6.2km/s
- Mean velocity, S wave
- 3.5km/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: 9 measurements, root-mean-square deviation 0.24 s. S wave: 5 measurements, root-mean-square deviation 0.20 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)9 stations | |||||
| SKQSteenkerque | 42.2 | 96 | 11:00:28.91+7.28 s | – | – |
| BOUBougnies | 46.6 | 136 | 11:00:29.60+7.97 s | 11:00:35.75+14.12 s | 6.15 |
| BRQBracquegnies | 51.5 | 116 | 11:00:30.22+8.59 s | 11:00:36.77+15.14 s | 6.55 |
| RQRRonquières | 53.1 | 100 | 11:00:30.97+9.34 s | 11:00:37.49+15.86 s | 6.52 |
| SNFSeneffe | 59.9 | 109 | 11:00:31.58+9.95 s | 11:00:39.01+17.38 s | 7.43 |
| UCCBUccle | 62.8 | 79 | 11:00:31.91+10.28 s | – | – |
| ZEVZevekote | 64.7 | 321 | 11:00:32.09+10.46 s | – | – |
| TGATangissart | 73.9 | 97 | 11:00:34.25+12.62 s | – | – |
| DOUDourbes | 102.9 | 130 | 11:00:38.87+17.24 s | 11:00:51.62+29.99 s | 12.75 |