ANDENNE (BE)
Quarry blast25 February 2020
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 14:20:222020-02-25
- UTC
- 13:20:222020-02-25
Main parameters
| Date and time | 2020-02-25 13:20:22 UTC 2020-02-25 14:20:22 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.509° N, 4.977° E Uncertainty ± 1.0 km |
| Event ID | ROB 9325 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-02-25 15:17:01 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
- 15.8 – 92.6km
- Mean velocity, P wave
- 5.6km/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: 11 measurements, root-mean-square deviation 0.33 s. S wave: 6 measurements, root-mean-square deviation 0.31 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 | 15.8 | 150 | 13:20:24.51+2.37 s | 13:20:26.52+4.38 s | 2.01 |
| CLAClavier | 25.1 | 113 | 13:20:26.47+4.33 s | 13:20:29.94+7.80 s | 3.47 |
| MRDMaredsous | 27.4 | 213 | 13:20:27.06+4.92 s | 13:20:31.01+8.87 s | 3.95 |
| TGATangissart | 34.0 | 289 | 13:20:28.14+6.00 s | 13:20:32.54+10.40 s | 4.40 |
| RCHRochefort | 43.2 | 156 | 13:20:29.62+7.48 s | 13:20:35.55+13.41 s | 5.93 |
| EBNEben-Emael | 59.0 | 57 | 13:20:32.31+10.17 s | – | – |
| MEMHMembach | 74.0 | 81 | 13:20:34.66+12.52 s | 13:20:46.25+24.11 s | 11.59 |
| HOUHouvegnez | 75.0 | 103 | 13:20:35.14+13.00 s | – | – |
| KLBKalborn | 92.6 | 119 | 13:20:38.38+16.24 s | – | – |
| Dutch seismic network (KNMI)2 stations | |||||
| VKBValkenburg | 69.6 | 55 | 13:20:35.02+12.88 s | – | – |
| HGNHeimansgroeve | 73.3 | 67 | 13:20:34.50+12.36 s | – | – |