ARLON (BE)
Quarry blast25 June 2020
- Magnitude
- 2.0ML
- Depth
- –
- Belgian time
- 11:15:502020-06-25
- UTC
- 09:15:502020-06-25
Main parameters
| Date and time | 2020-06-25 09:15:50 UTC 2020-06-25 11:15:50 Belgian time |
|---|---|
| Magnitude | ML 2.0 |
| Epicentral coordinates | 49.697° N, 5.775° E Uncertainty ± 1.7 km |
| Event ID | ROB 10390 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-06-26 16:43:06 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
- 9
- Epicentral distance
- 40.6 – 119.3km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.4km/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: 9 measurements, root-mean-square deviation 0.40 s. S wave: 8 measurements, root-mean-square deviation 0.64 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)8 stations | |||||
| VIAVianden | 40.6 | 49 | 09:15:58.17+7.21 s | 09:16:03.05+12.09 s | 4.88 |
| KLBKalborn | 50.9 | 28 | 09:15:59.97+9.01 s | 09:16:06.77+15.81 s | 6.80 |
| RCHRochefort | 64.4 | 323 | 09:16:01.86+10.90 s | 09:16:08.78+17.82 s | 6.92 |
| HOUHouvegnez | 75.0 | 13 | 09:16:03.73+12.77 s | 09:16:12.82+21.86 s | 9.09 |
| GESGesves | 91.1 | 328 | 09:16:06.17+15.21 s | – | – |
| MRGMont Rigi | 93.1 | 13 | 09:16:07.51+16.55 s | 09:16:18.54+27.58 s | 11.03 |
| DOUDourbes | 95.7 | 298 | 09:16:07.99+17.03 s | 09:16:19.10+28.14 s | 11.11 |
| MEMHMembach | 102.9 | 9 | 09:16:08.36+17.40 s | 09:16:19.95+28.99 s | 11.59 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 119.3 | 5 | 09:16:12.23+21.27 s | 09:16:26.13+35.17 s | 13.90 |