LA ROCHE-EN-ARDENNE (BE)
Quarry blast10 July 2020
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 17:11:002020-07-10
- UTC
- 15:11:002020-07-10
Main parameters
| Date and time | 2020-07-10 15:11:00 UTC 2020-07-10 17:11:00 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.194° N, 5.585° E Uncertainty ± 0.6 km |
| Event ID | ROB 10440 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-07-10 19:02:58 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
- 16
- Epicentral distance
- 26.0 – 121.2km
- Mean velocity, P wave
- 5.9km/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: 15 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)15 stations | |||||
| RCHRochefort | 26.0 | 261 | 15:11:04.77+4.63 s | 15:11:08.15+8.01 s | 3.38 |
| CLAClavier | 32.1 | 321 | 15:11:05.96+5.82 s | – | – |
| HOUHouvegnez | 34.8 | 59 | 15:11:05.43+5.29 s | – | – |
| KLBKalborn | 38.9 | 105 | 15:11:06.89+6.75 s | – | – |
| GESGesves | 41.4 | 301 | 15:11:07.62+7.48 s | – | – |
| LCHLa Chartreuse | 49.5 | 1 | 15:11:08.62+8.48 s | – | – |
| MRGMont Rigi | 49.6 | 44 | 15:11:08.65+8.51 s | – | – |
| VIAVianden | 52.7 | 123 | 15:11:09.56+9.42 s | – | – |
| MEMHMembach | 55.2 | 33 | 15:11:09.78+9.64 s | – | – |
| MEMSMembach | 55.2 | 33 | 15:11:09.82+9.68 s | – | – |
| DOUDourbes | 71.6 | 262 | 15:11:12.54+12.40 s | – | – |
| TGATangissart | 88.3 | 302 | 15:11:15.29+15.15 s | – | – |
| SKQSteenkerque | 118.3 | 296 | 15:11:20.16+20.02 s | – | – |
| BOUBougnies | 118.9 | 281 | 15:11:20.59+20.45 s | – | – |
| DSLBDessel | 121.2 | 343 | 15:11:20.87+20.73 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 68.0 | 21 | 15:11:12.06+11.92 s | – | – |