ANDENNE (BE)
Quarry blast19 October 2020
- Magnitude
- 1.8ML
- Depth
- –
- Belgian time
- 13:45:152020-10-19
- UTC
- 11:45:152020-10-19
Main parameters
| Date and time | 2020-10-19 11:45:15 UTC 2020-10-19 13:45:15 Belgian time |
|---|---|
| Magnitude | ML 1.8 |
| Epicentral coordinates | 50.468° N, 4.965° E Uncertainty ± 0.7 km |
| Event ID | ROB 11120 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-10-20 00:11:03 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
- 5
- Epicentral distance
- 12.7 – 91.3km
- Mean velocity, S wave
- 3.2km/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. S wave: 4 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)5 stations | |||||
| GESGesves | 12.7 | 137 | 11:45:18.52+2.62 s | 11:45:20.25+4.35 s | 1.73 |
| MRDMaredsous | 23.2 | 217 | – | 11:45:22.64+6.74 s | – |
| CLAClavier | 24.6 | 103 | – | 11:45:23.98+8.08 s | – |
| RCHRochefort | 39.5 | 152 | 11:45:22.50+6.60 s | 11:45:28.46+12.56 s | 5.96 |
| KLBKalborn | 91.3 | 116 | 11:45:32.45+16.55 s | – | – |
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