OLNE (BE)
Quarry blast10 August 2020
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 11:51:402020-08-10
- UTC
- 09:51:402020-08-10
Main parameters
| Date and time | 2020-08-10 09:51:40 UTC 2020-08-10 11:51:40 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.608° N, 5.712° E Uncertainty ± 0.9 km |
| Event ID | ROB 10630 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-08-10 12:02:51 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
- 11
- Epicentral distance
- 8.7 – 97.9km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.1km/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: 11 measurements, root-mean-square deviation 0.23 s. S wave: 5 measurements, root-mean-square deviation 0.21 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)9 stations | |||||
| LCHLa Chartreuse | 8.7 | 293 | 09:51:41.94+1.35 s | 09:51:43.71+3.12 s | 1.77 |
| MEMHMembach | 21.1 | 90 | 09:51:44.26+3.67 s | 09:51:47.55+6.96 s | 3.29 |
| MEMSMembach | 21.1 | 90 | 09:51:44.26+3.67 s | – | – |
| EBNEben-Emael | 21.1 | 354 | 09:51:44.69+4.10 s | – | – |
| MRGMont Rigi | 27.9 | 113 | 09:51:45.20+4.61 s | 09:51:49.37+8.78 s | 4.17 |
| HOUHouvegnez | 35.1 | 144 | 09:51:47.02+6.43 s | – | – |
| CLAClavier | 35.9 | 234 | 09:51:46.79+6.20 s | – | – |
| KLBKalborn | 63.2 | 153 | 09:51:52.04+11.45 s | – | – |
| DOUDourbes | 97.9 | 235 | 09:51:57.65+17.06 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 23.3 | 42 | 09:51:44.73+4.14 s | 09:51:48.37+7.78 s | 3.64 |
| VKBValkenburg | 29.2 | 10 | 09:51:45.45+4.86 s | 09:51:50.06+9.47 s | 4.61 |