ANDENNE (BE)
Quarry blast10 May 2021
- Magnitude
- 1.7ML
- Depth
- –
- Belgian time
- 14:32:552021-05-10
- UTC
- 12:32:552021-05-10
Main parameters
| Date and time | 2021-05-10 12:32:55 UTC 2021-05-10 14:32:55 Belgian time |
|---|---|
| Magnitude | ML 1.7 |
| Epicentral coordinates | 50.461° N, 4.987° E Uncertainty ± 0.4 km |
| Event ID | ROB 13400 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2021-05-11 17:06:33 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
- 11.0 – 82.2km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.4km/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 0.18 s. S wave: 4 measurements, root-mean-square deviation 0.17 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 | 11.0 | 140 | 12:32:57.23+1.95 s | 12:32:59.08+3.80 s | 1.85 |
| CLAClavier | 22.8 | 102 | 12:32:59.06+3.78 s | 12:33:02.61+7.33 s | 3.55 |
| MRDMaredsous | 23.6 | 221 | 12:32:59.59+4.31 s | – | – |
| RCHRochefort | 38.1 | 153 | 12:33:02.09+6.81 s | – | – |
| DOUDourbes | 49.4 | 215 | 12:33:04.26+8.98 s | 12:33:10.19+14.91 s | 5.93 |
| SKQSteenkerque | 67.6 | 288 | 12:33:06.95+11.67 s | – | – |
| HOUHouvegnez | 73.3 | 99 | 12:33:07.86+12.58 s | 12:33:17.21+21.93 s | 9.35 |
| MEMHMembach | 74.4 | 77 | 12:33:08.14+12.86 s | – | – |
| MEMSMembach | 74.4 | 77 | 12:33:08.14+12.86 s | – | – |
| MRGMont Rigi | 77.4 | 85 | 12:33:08.62+13.34 s | – | – |
| TNLTernell | 82.2 | 80 | 12:33:09.58+14.30 s | – | – |