OLNE (BE)
Quarry blast29 October 2020
- Magnitude
- 1.2ML
- Depth
- –
- Belgian time
- 13:39:072020-10-29
- UTC
- 12:39:072020-10-29
Main parameters
| Date and time | 2020-10-29 12:39:07 UTC 2020-10-29 13:39:07 Belgian time |
|---|---|
| Magnitude | ML 1.2 |
| Epicentral coordinates | 50.581° N, 5.711° E Uncertainty ± 0.8 km |
| Event ID | ROB 11205 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-10-29 23:10:44 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
- 8
- Epicentral distance
- 10.2 – 49.4km
- 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: 8 measurements, root-mean-square deviation 0.12 s. S wave: 6 measurements, root-mean-square deviation 0.50 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)6 stations | |||||
| LCHLa Chartreuse | 10.2 | 309 | 12:39:08.98+1.93 s | 12:39:10.75+3.70 s | 1.77 |
| MEMHMembach | 21.4 | 81 | 12:39:11.01+3.96 s | 12:39:14.26+7.21 s | 3.25 |
| EBNEben-Emael | 24.2 | 354 | 12:39:11.45+4.40 s | 12:39:14.61+7.56 s | 3.16 |
| MRGMont Rigi | 26.9 | 107 | 12:39:12.00+4.95 s | – | – |
| CLAClavier | 34.1 | 238 | 12:39:13.38+6.33 s | 12:39:16.73+9.68 s | 3.35 |
| GESGesves | 49.4 | 244 | 12:39:15.56+8.51 s | 12:39:22.85+15.80 s | 7.29 |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 25.7 | 37 | 12:39:11.65+4.60 s | 12:39:15.16+8.11 s | 3.51 |
| VKBValkenburg | 32.2 | 9 | 12:39:12.81+5.76 s | – | – |