TOURNAI (BE)
Quarry blast8 June 2020
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 13:01:352020-06-08
- UTC
- 11:01:352020-06-08
Main parameters
| Date and time | 2020-06-08 11:01:35 UTC 2020-06-08 13:01:35 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.686° N, 3.410° E Uncertainty ± 1.1 km |
| Event ID | ROB 10215 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-06-10 15:10:02 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
- 47.5 – 202.7km
- 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: 6 measurements, root-mean-square deviation 0.14 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 | 47.5 | 95 | 11:01:43.64+8.53 s | 11:01:50.00+14.89 s | 6.36 |
| BOUBougnies | 50.3 | 131 | 11:01:43.66+8.55 s | – | – |
| BRQBracquegnies | 56.2 | 114 | 11:01:44.82+9.71 s | – | – |
| RQRRonquières | 58.3 | 98 | 11:01:45.21+10.10 s | – | – |
| MRDMaredsous | 105.4 | 113 | 11:01:53.03+17.92 s | – | – |
| DOUDourbes | 106.9 | 128 | 11:01:53.47+18.36 s | – | – |
| GESGesves | 123.5 | 105 | 11:01:56.07+20.96 s | 11:02:13.02+37.91 s | 16.95 |
| KLBKalborn | 202.7 | 108 | 11:02:08.10+32.99 s | 11:02:31.13+56.02 s | 23.03 |