TOURNAI (BE)
Quarry blast24 May 2018
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 12:31:042018-05-24
- UTC
- 10:31:042018-05-24
Main parameters
| Date and time | 2018-05-24 10:31:04 UTC 2018-05-24 12:31:04 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 50.641° N, 3.432° E Uncertainty ± 6.3 km |
| Event ID | ROB 6660 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-05-30 15:44:54 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
- 10
- Epicentral distance
- 45.9 – 185.4km
- Mean velocity, P wave
- 5.2km/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: 7 measurements, root-mean-square deviation 0.60 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)10 stations | |||||
| SKQSteenkerque | 45.9 | 89 | 10:31:11.57+7.00 s | 10:31:17.25+12.68 s | 5.68 |
| BRQBracquegnies | 53.0 | 109 | 10:31:12.73+8.16 s | – | – |
| RQRRonquières | 56.3 | 94 | 10:31:13.35+8.78 s | – | – |
| ZEVZevekote | 66.7 | 326 | 10:31:16.47+11.90 s | – | – |
| UCCSUccle | 67.8 | 75 | 10:31:16.21+11.64 s | – | – |
| MRDMaredsous | 102.1 | 111 | 10:31:23.16+18.59 s | 10:31:34.87+30.30 s | 11.71 |
| DOUDourbes | 102.6 | 126 | 10:31:21.52+16.95 s | 10:31:34.16+29.59 s | 12.64 |
| GESGesves | 120.8 | 103 | 10:31:25.66+21.09 s | 10:31:40.53+35.96 s | 14.87 |
| CLAClavier | 134.9 | 100 | 10:31:27.03+22.46 s | – | – |
| HOUHouvegnez | 185.4 | 99 | 10:31:35.75+31.18 s | – | – |