OLNE (BE)
Quarry blast22 February 2019
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 13:47:392019-02-22
- UTC
- 12:47:392019-02-22
Main parameters
| Date and time | 2019-02-22 12:47:39 UTC 2019-02-22 13:47:39 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.566° N, 5.727° E Uncertainty ± 0.7 km |
| Event ID | ROB 7845 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-02-22 13:59:40 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
- 12
- Epicentral distance
- 12.1 – 96.1km
- Mean velocity, P wave
- 6.0km/s
- Mean velocity, S wave
- 3.5km/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: 12 measurements, root-mean-square deviation 0.28 s. S wave: 10 measurements, root-mean-square deviation 0.34 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)10 stations | |||||
| LCHLa Chartreuse | 12.1 | 312 | 12:47:41.23+1.87 s | 12:47:43.21+3.85 s | 1.98 |
| MEMHMembach | 20.6 | 77 | 12:47:43.02+3.66 s | 12:47:46.08+6.72 s | 3.06 |
| MEMSMembach | 20.6 | 77 | 12:47:43.08+3.72 s | – | – |
| EBNEben-Emael | 25.9 | 352 | 12:47:43.98+4.62 s | – | – |
| HOUHouvegnez | 30.8 | 140 | 12:47:45.17+5.81 s | 12:47:48.90+9.54 s | 3.73 |
| CLAClavier | 34.3 | 242 | 12:47:45.01+5.65 s | 12:47:49.91+10.55 s | 4.90 |
| GESGesves | 49.7 | 246 | 12:47:48.01+8.65 s | 12:47:54.27+14.91 s | 6.26 |
| RCHRochefort | 57.9 | 218 | 12:47:49.42+10.06 s | 12:47:56.05+16.69 s | 6.63 |
| KLBKalborn | 58.6 | 152 | 12:47:49.86+10.50 s | 12:47:56.94+17.58 s | 7.08 |
| DOUDourbes | 96.1 | 237 | 12:47:56.17+16.81 s | 12:48:06.91+27.55 s | 10.74 |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 26.3 | 33 | 12:47:44.00+4.64 s | 12:47:47.56+8.20 s | 3.56 |
| VKBValkenburg | 33.7 | 7 | 12:47:45.23+5.87 s | 12:47:49.94+10.58 s | 4.71 |