COUSOLRE (FR)
Quarry blast14 May 2018
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 13:08:062018-05-14
- UTC
- 11:08:062018-05-14
Main parameters
| Date and time | 2018-05-14 11:08:06 UTC 2018-05-14 13:08:06 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.239° N, 4.116° E Uncertainty ± 2.4 km |
| Event ID | ROB 6610 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2018-05-16 11:23:51 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
- 20.7 – 153.0km
- 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 0.26 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 | 20.7 | 324 | 11:08:09.96+3.64 s | 11:08:12.94+6.62 s | 2.98 |
| BRQBracquegnies | 27.0 | 3 | 11:08:11.49+5.17 s | – | – |
| DOUDourbes | 37.8 | 115 | 11:08:13.02+6.70 s | 11:08:17.82+11.50 s | 4.80 |
| RQRRonquières | 41.6 | 11 | 11:08:13.84+7.52 s | – | – |
| MRDMaredsous | 47.0 | 81 | 11:08:14.27+7.95 s | – | – |
| LESLessines | 56.0 | 340 | 11:08:16.30+9.98 s | 11:08:23.18+16.86 s | 6.88 |
| UCCSUccle | 64.5 | 15 | 11:08:16.99+10.67 s | – | – |
| GESGesves | 71.0 | 76 | 11:08:18.71+12.39 s | – | – |
| HOUHouvegnez | 135.2 | 84 | 11:08:28.82+22.50 s | – | – |
| MEMSMembach | 140.7 | 72 | 11:08:30.21+23.89 s | – | – |
| MRGMont Rigi | 142.6 | 77 | 11:08:30.93+24.61 s | – | – |
| KLBKalborn | 143.2 | 95 | 11:08:30.46+24.14 s | – | – |
| VIAVianden | 153.0 | 102 | 11:08:32.30+25.98 s | – | – |