LA ROCHE-EN-ARDENNE (BE)
Quarry blast15 October 2020
- Magnitude
- 1.9ML
- Depth
- –
- Belgian time
- 14:46:122020-10-15
- UTC
- 12:46:122020-10-15
Main parameters
| Date and time | 2020-10-15 12:46:12 UTC 2020-10-15 14:46:12 Belgian time |
|---|---|
| Magnitude | ML 1.9 |
| Epicentral coordinates | 50.197° N, 5.595° E Uncertainty ± 0.7 km |
| Event ID | ROB 11090 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-10-15 15:00:49 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
- 26.7 – 72.4km
- Mean velocity, P wave
- 6.0km/s
- Mean velocity, S wave
- 3.3km/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: 10 measurements, root-mean-square deviation 0.16 s. S wave: 5 measurements, root-mean-square deviation 0.37 s.
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 | |||||
| RCHRochefort | 26.7 | 260 | 12:46:17.02+4.53 s | 12:46:20.28+7.79 s | 3.26 |
| CLAClavier | 32.3 | 320 | 12:46:18.11+5.62 s | 12:46:22.90+10.41 s | 4.79 |
| HOUHouvegnez | 34.1 | 59 | 12:46:18.29+5.80 s | – | – |
| KLBKalborn | 38.3 | 106 | 12:46:19.26+6.77 s | 12:46:24.17+11.68 s | 4.91 |
| GESGesves | 41.8 | 300 | 12:46:19.92+7.43 s | 12:46:25.68+13.19 s | 5.76 |
| MRGMont Rigi | 48.9 | 44 | 12:46:20.66+8.17 s | – | – |
| MEMSMembach | 54.5 | 33 | 12:46:21.82+9.33 s | – | – |
| MEMHMembach | 54.5 | 33 | 12:46:22.13+9.64 s | – | – |
| EBNEben-Emael | 67.0 | 5 | 12:46:24.08+11.59 s | – | – |
| DOUDourbes | 72.4 | 261 | 12:46:24.87+12.38 s | 12:46:34.12+21.63 s | 9.25 |