TOURNAI (BE)
Quarry blast4 June 2019
- Magnitude
- 2.1ML
- Depth
- –
- Belgian time
- 13:01:572019-06-04
- UTC
- 11:01:572019-06-04
Main parameters
| Date and time | 2019-06-04 11:01:57 UTC 2019-06-04 13:01:57 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 50.641° N, 3.426° E Uncertainty ± 3.2 km |
| Event ID | ROB 8200 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-06-04 14:01:26 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
- 12
- Epicentral distance
- 46.2 – 200.1km
- Mean velocity, P wave
- 6.1km/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 0.97 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)12 stations | |||||
| BOUBougnies | 46.2 | 127 | 11:02:05.68+8.21 s | – | – |
| SKQSteenkerque | 46.2 | 89 | 11:02:05.43+7.96 s | 11:02:10.93+13.46 s | 5.50 |
| BRQBracquegnies | 53.3 | 109 | 11:02:06.51+9.04 s | – | – |
| RQRRonquières | 56.7 | 94 | 11:02:07.96+10.49 s | – | – |
| ZEVZevekote | 66.5 | 326 | 11:02:08.95+11.48 s | – | – |
| UCCBUccle | 68.2 | 75 | 11:02:06.46+8.99 s | – | – |
| MRDMaredsous | 102.4 | 111 | 11:02:14.77+17.30 s | 11:02:27.66+30.19 s | 12.89 |
| DOUDourbes | 102.9 | 126 | 11:02:15.13+17.66 s | 11:02:28.00+30.53 s | 12.87 |
| GESGesves | 121.2 | 103 | 11:02:17.79+20.32 s | 11:02:34.46+36.99 s | 16.67 |
| DSLSDessel | 132.6 | 60 | 11:02:21.52+24.05 s | – | – |
| CLAClavier | 135.3 | 100 | 11:02:20.05+22.58 s | 11:02:37.73+40.26 s | 17.68 |
| KLBKalborn | 200.1 | 106 | 11:02:29.62+32.15 s | 11:02:51.81+54.34 s | 22.19 |