ANDENNE (BE)
Quarry blast3 June 2021
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 13:44:302021-06-03
- UTC
- 11:44:302021-06-03
Main parameters
| Date and time | 2021-06-03 11:44:30 UTC 2021-06-03 13:44:30 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.508° N, 4.974° E Uncertainty ± 0.9 km |
| Event ID | ROB 13585 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-06-08 10:13:02 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
- 15.9 – 92.7km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.3km/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 0.30 s. S wave: 8 measurements, root-mean-square deviation 0.47 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 | |||||
| GESGesves | 15.9 | 150 | 11:44:32.43+2.43 s | 11:44:34.76+4.76 s | 2.33 |
| CLAClavier | 25.3 | 113 | 11:44:34.33+4.33 s | 11:44:38.03+8.03 s | 3.70 |
| MRDMaredsous | 27.2 | 213 | 11:44:35.06+5.06 s | 11:44:38.97+8.97 s | 3.91 |
| TGATangissart | 33.8 | 289 | 11:44:36.11+6.11 s | 11:44:40.52+10.52 s | 4.41 |
| DOUDourbes | 53.3 | 211 | 11:44:39.68+9.68 s | 11:44:45.96+15.96 s | 6.28 |
| SKQSteenkerque | 65.2 | 284 | 11:44:40.84+10.84 s | 11:44:49.45+19.45 s | 8.61 |
| MEMHMembach | 74.2 | 81 | 11:44:42.62+12.62 s | 11:44:53.26+23.26 s | 10.64 |
| HOUHouvegnez | 75.2 | 103 | 11:44:42.91+12.91 s | 11:44:52.05+22.05 s | 9.14 |
| KLBKalborn | 92.7 | 119 | 11:44:46.24+16.24 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.5 | 67 | 11:44:42.48+12.48 s | – | – |