OLNE (BE)
Quarry blast20 January 2020
- Magnitude
- 1.0ML
- Depth
- –
- Belgian time
- 13:49:072020-01-20
- UTC
- 12:49:072020-01-20
Main parameters
| Date and time | 2020-01-20 12:49:07 UTC 2020-01-20 13:49:07 Belgian time |
|---|---|
| Magnitude | ML 1.0 |
| Epicentral coordinates | 50.596° N, 5.713° E Uncertainty ± 0.5 km |
| Event ID | ROB 9140 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-01-20 13:58:17 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
- 9.4 – 62.0km
- 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: 10 measurements, root-mean-square deviation 0.19 s. S wave: 7 measurements, root-mean-square deviation 0.26 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 | |||||
| LCHLa Chartreuse | 9.4 | 300 | 12:49:09.57+1.75 s | 12:49:11.01+3.19 s | 1.44 |
| MEMSMembach | 21.1 | 86 | 12:49:11.63+3.81 s | 12:49:14.40+6.58 s | 2.77 |
| MEMHMembach | 21.1 | 86 | 12:49:11.66+3.84 s | 12:49:14.40+6.58 s | 2.74 |
| EBNEben-Emael | 22.4 | 354 | 12:49:12.10+4.28 s | 12:49:15.21+7.39 s | 3.11 |
| MRGMont Rigi | 27.3 | 110 | 12:49:12.98+5.16 s | 12:49:15.73+7.91 s | 2.75 |
| HOUHouvegnez | 34.0 | 142 | 12:49:14.48+6.66 s | – | – |
| CLAClavier | 35.2 | 236 | 12:49:14.01+6.19 s | 12:49:18.65+10.83 s | 4.64 |
| KLBKalborn | 62.0 | 153 | 12:49:18.81+10.99 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 24.2 | 40 | 12:49:12.26+4.44 s | 12:49:15.42+7.60 s | 3.16 |
| VKBValkenburg | 30.5 | 9 | 12:49:13.37+5.55 s | – | – |