ANDENNE (BE)
Quarry blast16 March 2021
- Magnitude
- 1.6ML
- Depth
- –
- Belgian time
- 14:35:272021-03-16
- UTC
- 13:35:272021-03-16
Main parameters
| Date and time | 2021-03-16 13:35:27 UTC 2021-03-16 14:35:27 Belgian time |
|---|---|
| Magnitude | ML 1.6 |
| Epicentral coordinates | 50.486° N, 5.001° E Uncertainty ± 2.0 km |
| Event ID | ROB 12760 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-03-17 09:52:59 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
- 8
- Epicentral distance
- 12.8 – 89.9km
- Mean velocity, P wave
- 7.8km/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: 8 measurements, root-mean-square deviation 4.56 s. S wave: 7 measurements, root-mean-square deviation 0.67 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)7 stations | |||||
| GESGesves | 12.8 | 151 | 13:35:29.25+1.92 s | 13:35:31.97+4.64 s | 2.72 |
| CLAClavier | 22.7 | 109 | 13:35:31.06+3.73 s | 13:35:34.45+7.12 s | 3.39 |
| MRDMaredsous | 26.3 | 219 | 13:35:31.70+4.37 s | 13:35:36.03+8.70 s | 4.33 |
| DOUDourbes | 52.2 | 214 | 13:35:36.70+9.37 s | 13:35:43.49+16.16 s | 6.79 |
| SKQSteenkerque | 67.7 | 286 | 13:35:24.71−2.62 s | – | – |
| MEMHMembach | 72.8 | 79 | 13:35:38.80+11.47 s | 13:35:51.18+23.85 s | 12.38 |
| KLBKalborn | 89.9 | 118 | 13:35:43.31+15.98 s | 13:35:53.99+26.66 s | 10.68 |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 72.8 | 64 | 13:35:39.20+11.87 s | 13:35:50.02+22.69 s | 10.82 |