TOURNAI (BE)
Quarry blast13 June 2019
- Magnitude
- 2.2ML
- Depth
- –
- Belgian time
- 12:31:282019-06-13
- UTC
- 10:31:282019-06-13
Main parameters
| Date and time | 2019-06-13 10:31:28 UTC 2019-06-13 12:31:28 Belgian time |
|---|---|
| Magnitude | ML 2.2 |
| Epicentral coordinates | 50.587° N, 3.311° E Uncertainty ± 3.9 km |
| Event ID | ROB 8240 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-06-13 14:23:45 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
- 13
- Epicentral distance
- 50.1 – 191.1km
- Mean velocity, P wave
- 5.4km/s
- Mean velocity, S wave
- 3.2km/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 0.43 s. S wave: 5 measurements, root-mean-square deviation 1.07 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)13 stations | |||||
| BOUBougnies | 50.1 | 116 | 10:31:37.25+8.93 s | – | – |
| SKQSteenkerque | 54.9 | 82 | 10:31:37.35+9.03 s | 10:31:43.11+14.79 s | 5.76 |
| BRQBracquegnies | 59.7 | 101 | 10:31:38.47+10.15 s | – | – |
| RQRRonquières | 64.8 | 88 | 10:31:39.58+11.26 s | – | – |
| ZEVZevekote | 67.7 | 335 | 10:31:39.36+11.04 s | 10:31:49.07+20.75 s | 9.71 |
| UCCBUccle | 77.7 | 72 | 10:31:41.99+13.67 s | 10:31:49.57+21.25 s | 7.58 |
| DOUDourbes | 106.5 | 120 | 10:31:46.89+18.57 s | 10:32:01.12+32.80 s | 14.23 |
| MRDMaredsous | 108.3 | 106 | 10:31:46.67+18.35 s | 10:32:00.82+32.50 s | 14.15 |
| GESGesves | 128.0 | 99 | 10:31:49.78+21.46 s | 10:32:07.02+38.70 s | 17.24 |
| CLAClavier | 142.5 | 97 | 10:31:53.10+24.78 s | 10:32:10.57+42.25 s | 17.47 |
| MOLTMol | 143.0 | 60 | 10:31:52.54+24.22 s | 10:32:10.72+42.40 s | 18.18 |
| MEMHMembach | 191.1 | 88 | 10:31:59.49+31.17 s | 10:32:19.79+51.47 s | 20.30 |
| MEMSMembach | 191.1 | 88 | 10:31:59.61+31.29 s | – | – |