OTTANGE (FR)
Quarry blast18 July 2019
- Magnitude
- 2.1ML
- Depth
- –
- Belgian time
- 12:11:582019-07-18
- UTC
- 10:11:582019-07-18
Main parameters
| Date and time | 2019-07-18 10:11:58 UTC 2019-07-18 12:11:58 Belgian time |
|---|---|
| Magnitude | ML 2.1 |
| Epicentral coordinates | 49.459° N, 6.012° E Uncertainty ± 3.5 km |
| Event ID | ROB 8400 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-07-18 13:10:38 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
- 71.7 – 152.3km
- Mean velocity, P wave
- 5.7km/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: 4 measurements, root-mean-square deviation 1.40 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)7 stations | |||||
| KLBKalborn | 71.7 | 6 | 10:12:10.91+12.20 s | 10:12:19.65+20.94 s | 8.74 |
| RCHRochefort | 95.9 | 324 | 10:12:11.77+13.06 s | 10:12:26.48+27.77 s | 14.71 |
| HOUHouvegnez | 99.6 | 360 | 10:12:15.37+16.66 s | – | – |
| CLAClavier | 118.4 | 335 | 10:12:19.04+20.33 s | – | – |
| GESGesves | 122.6 | 328 | 10:12:19.63+20.92 s | 10:12:35.10+36.39 s | 15.47 |
| DOUDourbes | 124.2 | 305 | 10:12:19.60+20.89 s | 10:12:36.42+37.71 s | 16.82 |
| MEMHMembach | 128.0 | 360 | 10:12:20.81+22.10 s | 10:12:36.28+37.57 s | 15.47 |
| Network STR1 station | |||||
| WLSWelschbruch | 152.3 | 139 | 10:12:24.18+25.47 s | – | – |