ANDENNE (BE)
Quarry blast6 May 2021
- Magnitude
- 1.5ML
- Depth
- –
- Belgian time
- 14:37:552021-05-06
- UTC
- 12:37:552021-05-06
Main parameters
| Date and time | 2021-05-06 12:37:55 UTC 2021-05-06 14:37:55 Belgian time |
|---|---|
| Magnitude | ML 1.5 |
| Epicentral coordinates | 50.457° N, 5.017° E Uncertainty ± 0.8 km |
| Event ID | ROB 13335 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-07 08:29:49 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
- 9.4 – 87.3km
- Mean velocity, P wave
- 5.7km/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: 11 measurements, root-mean-square deviation 0.21 s. S wave: 6 measurements, root-mean-square deviation 0.45 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)11 stations | |||||
| GESGesves | 9.4 | 148 | 12:37:57.60+1.65 s | 12:37:59.41+3.46 s | 1.81 |
| CLAClavier | 20.7 | 102 | 12:37:59.83+3.88 s | 12:38:01.99+6.04 s | 2.16 |
| MRDMaredsous | 24.7 | 226 | 12:38:00.03+4.08 s | 12:38:03.74+7.79 s | 3.71 |
| RCHRochefort | 36.7 | 156 | 12:38:02.52+6.57 s | 12:38:07.89+11.94 s | 5.37 |
| LCHLa Chartreuse | 45.9 | 64 | 12:38:04.19+8.24 s | 12:38:09.44+13.49 s | 5.25 |
| DOUDourbes | 50.2 | 217 | 12:38:04.76+8.81 s | 12:38:10.91+14.96 s | 6.15 |
| UCCBUccle | 60.0 | 309 | 12:38:06.40+10.45 s | – | – |
| MEMHMembach | 72.4 | 76 | 12:38:08.61+12.66 s | – | – |
| MRGMont Rigi | 75.3 | 85 | 12:38:09.24+13.29 s | – | – |
| TNLTernell | 80.2 | 79 | 12:38:10.07+14.12 s | – | – |
| KLBKalborn | 87.3 | 117 | 12:38:11.82+15.87 s | – | – |