ANDENNE (BE)
Quarry blast30 January 2020
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 13:48:202020-01-30
- UTC
- 12:48:202020-01-30
Main parameters
| Date and time | 2020-01-30 12:48:20 UTC 2020-01-30 13:48:20 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.506° N, 4.977° E Uncertainty ± 1.2 km |
| Event ID | ROB 9215 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-01-31 13:20:06 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
- 12
- Epicentral distance
- 15.5 – 92.4km
- Mean velocity, P wave
- 5.8km/s
- Mean velocity, S wave
- 3.1km/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: 12 measurements, root-mean-square deviation 0.30 s. S wave: 7 measurements, root-mean-square deviation 0.37 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 | 15.5 | 150 | 12:48:22.89+2.36 s | 12:48:25.00+4.47 s | 2.11 |
| CLAClavier | 25.0 | 113 | 12:48:24.85+4.32 s | 12:48:28.70+8.17 s | 3.85 |
| MRDMaredsous | 27.1 | 213 | 12:48:25.34+4.81 s | 12:48:29.55+9.02 s | 4.21 |
| RCHRochefort | 42.9 | 155 | 12:48:28.03+7.50 s | 12:48:34.46+13.93 s | 6.43 |
| DOUDourbes | 53.2 | 211 | 12:48:29.86+9.33 s | 12:48:37.07+16.54 s | 7.21 |
| RQRRonquières | 54.5 | 282 | 12:48:29.91+9.38 s | – | – |
| MEMSMembach | 74.1 | 81 | 12:48:32.61+12.08 s | 12:48:44.41+23.88 s | 11.80 |
| MEMHMembach | 74.1 | 81 | 12:48:32.86+12.33 s | – | – |
| HOUHouvegnez | 74.9 | 103 | 12:48:33.53+13.00 s | – | – |
| MRGMont Rigi | 77.9 | 89 | 12:48:34.26+13.73 s | – | – |
| KLBKalborn | 92.4 | 119 | 12:48:36.84+16.31 s | – | – |
| Dutch seismic network (KNMI)1 station | |||||
| HGNHeimansgroeve | 73.4 | 67 | 12:48:33.03+12.50 s | 12:48:43.40+22.87 s | 10.37 |