LONTZEN (BE)
Quarry blast16 April 2020
- Magnitude
- 1.1ML
- Depth
- –
- Belgian time
- 13:46:232020-04-16
- UTC
- 11:46:232020-04-16
Main parameters
| Date and time | 2020-04-16 11:46:23 UTC 2020-04-16 13:46:23 Belgian time |
|---|---|
| Magnitude | ML 1.1 |
| Epicentral coordinates | 50.659° N, 6.026° E Uncertainty ± 0.9 km |
| Event ID | ROB 9830 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-04-16 14:15:13 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
- 7
- Epicentral distance
- 5.7 – 57.9km
- Mean velocity, P wave
- 5.8km/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: 7 measurements, root-mean-square deviation 0.13 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 | |||||
| MEMHMembach | 5.7 | 191 | 11:46:24.48+1.04 s | 11:46:25.51+2.07 s | 1.03 |
| MEMSMembach | 5.7 | 191 | 11:46:24.48+1.04 s | – | – |
| MRGMont Rigi | 16.9 | 168 | 11:46:26.58+3.14 s | 11:46:29.33+5.89 s | 2.75 |
| EBNEben-Emael | 28.9 | 302 | 11:46:28.85+5.41 s | – | – |
| LCHLa Chartreuse | 30.3 | 266 | 11:46:28.85+5.41 s | – | – |
| CLAClavier | 57.9 | 243 | 11:46:33.47+10.03 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 13.4 | 330 | 11:46:26.03+2.59 s | 11:46:28.01+4.57 s | 1.98 |
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