OLNE (BE)
Quarry blast9 April 2019
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 13:57:402019-04-09
- UTC
- 11:57:402019-04-09
Main parameters
| Date and time | 2019-04-09 11:57:40 UTC 2019-04-09 13:57:40 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.594° N, 5.707° E Uncertainty ± 0.7 km |
| Event ID | ROB 8035 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-04-09 14:06:49 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
- 9.2 – 96.7km
- Mean velocity, P wave
- 5.7km/s
- Mean velocity, S wave
- 3.0km/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 0.06 s. S wave: 4 measurements, root-mean-square deviation 0.14 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 | 9.2 | 303 | 11:57:42.29+1.61 s | 11:57:43.94+3.26 s | 1.65 |
| MEMHMembach | 21.5 | 85 | 11:57:44.48+3.80 s | 11:57:47.81+7.13 s | 3.33 |
| MEMSMembach | 21.5 | 85 | 11:57:44.49+3.81 s | – | – |
| EBNEben-Emael | 22.7 | 355 | 11:57:44.60+3.92 s | 11:57:48.08+7.40 s | 3.48 |
| MRGMont Rigi | 27.6 | 109 | 11:57:45.58+4.90 s | – | – |
| HOUHouvegnez | 34.0 | 141 | 11:57:46.76+6.08 s | – | – |
| CLAClavier | 34.7 | 236 | 11:57:46.67+5.99 s | – | – |
| KLBKalborn | 61.9 | 152 | 11:57:51.61+10.93 s | – | – |
| DOUDourbes | 96.7 | 235 | 11:57:57.70+17.02 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 24.7 | 40 | 11:57:45.08+4.40 s | 11:57:49.02+8.34 s | 3.94 |
| VKBValkenburg | 30.9 | 10 | 11:57:46.14+5.46 s | – | – |