CELLES (BE)
Quarry blast19 March 2019
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 12:29:062019-03-19
- UTC
- 11:29:062019-03-19
Main parameters
| Date and time | 2019-03-19 11:29:06 UTC 2019-03-19 12:29:06 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.668° N, 3.481° E Uncertainty ± 14.0 km |
| Event ID | ROB 7965 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-03-19 13:07:30 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
- 26.0 – 132.0km
- Mean velocity, P wave
- 6.3km/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: 8 measurements, root-mean-square deviation 0.22 s. S wave: 4 measurements, root-mean-square deviation 0.53 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)9 stations | |||||
| LESLessines | 26.0 | 79 | 11:29:11.89+5.39 s | 11:29:15.02+8.52 s | 3.13 |
| SKQSteenkerque | 42.4 | 93 | 11:29:14.01+7.51 s | 11:29:19.92+13.42 s | 5.91 |
| BOUBougnies | 45.2 | 133 | 11:29:14.47+7.97 s | – | – |
| BRQBracquegnies | 50.8 | 114 | 11:29:15.29+8.79 s | – | – |
| RQRRonquières | 53.1 | 97 | 11:29:15.68+9.18 s | – | – |
| MRDMaredsous | 100.0 | 114 | 11:29:23.50+17.00 s | – | – |
| DOUDourbes | 101.7 | 128 | 11:29:23.81+17.31 s | 11:29:37.08+30.58 s | 13.27 |
| GESGesves | 118.1 | 105 | 11:29:26.48+19.98 s | 11:29:40.37+33.87 s | 13.89 |
| CLAClavier | 132.0 | 101 | 11:29:28.53+22.03 s | 11:29:43.59+37.09 s | 15.06 |