OTTANGE (FR)
Quarry blast2 April 2020
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 10:39:582020-04-02
- UTC
- 08:39:582020-04-02
Main parameters
| Date and time | 2020-04-02 08:39:58 UTC 2020-04-02 10:39:58 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 49.449° N, 5.970° E Uncertainty ± 4.0 km |
| Event ID | ROB 9695 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-04-02 10:59:14 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
- 5
- Epicentral distance
- 56.6 – 122.4km
- Mean velocity, P wave
- 5.4km/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 0.13 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)5 stations | |||||
| VIAVianden | 56.6 | 17 | 08:40:08.03+9.30 s | 08:40:14.24+15.51 s | 6.21 |
| KLBKalborn | 73.1 | 8 | 08:40:11.12+12.39 s | 08:40:19.65+20.92 s | 8.53 |
| CLAClavier | 118.1 | 336 | 08:40:19.19+20.46 s | – | – |
| MRGMont Rigi | 118.4 | 4 | 08:40:19.60+20.87 s | 08:40:33.86+35.13 s | 14.26 |
| DOUDourbes | 122.4 | 306 | 08:40:19.69+20.96 s | – | – |