OLNE (BE)
Quarry blast14 May 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 13:46:522020-05-14
- UTC
- 11:46:522020-05-14
Main parameters
| Date and time | 2020-05-14 11:46:52 UTC 2020-05-14 13:46:52 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.587° N, 5.707° E Uncertainty ± 1.2 km |
| Event ID | ROB 10020 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-05-14 14:45:29 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
- 6
- Epicentral distance
- 9.6 – 33.5km
- Mean velocity, P wave
- 4.9km/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: 6 measurements, root-mean-square deviation 0.91 s. S wave: 6 measurements, root-mean-square deviation 0.43 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)4 stations | |||||
| LCHLa Chartreuse | 9.6 | 307 | 11:46:54.13+1.39 s | 11:46:56.57+3.83 s | 2.44 |
| MEMHMembach | 21.6 | 83 | 11:46:56.40+3.66 s | 11:46:59.79+7.05 s | 3.39 |
| MRGMont Rigi | 27.4 | 108 | 11:46:57.46+4.72 s | 11:47:01.25+8.51 s | 3.79 |
| HOUHouvegnez | 33.5 | 141 | 11:47:01.11+8.37 s | 11:47:03.37+10.63 s | 2.26 |
| Dutch seismic network (KNMI)2 stations | |||||
| HGNHeimansgroeve | 25.2 | 39 | 11:46:56.85+4.11 s | 11:47:00.78+8.04 s | 3.93 |
| VKBValkenburg | 31.6 | 10 | 11:46:58.24+5.50 s | 11:47:03.21+10.47 s | 4.97 |