NAMUR (BE)
Quarry blast9 March 2020
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 13:36:262020-03-09
- UTC
- 12:36:262020-03-09
Main parameters
| Date and time | 2020-03-09 12:36:26 UTC 2020-03-09 13:36:26 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.491° N, 4.912° E Uncertainty ± 1.0 km |
| Event ID | ROB 9425 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-09 17:00:00 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
- 4
- Epicentral distance
- 17.2 – 78.9km
- Mean velocity, P wave
- 5.8km/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: 4 measurements, root-mean-square deviation 0.23 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)4 stations | |||||
| GESGesves | 17.2 | 133 | 12:36:29.18+2.76 s | 12:36:31.84+5.42 s | 2.66 |
| MRDMaredsous | 23.4 | 206 | 12:36:30.90+4.48 s | 12:36:33.81+7.39 s | 2.91 |
| CLAClavier | 28.8 | 106 | 12:36:31.56+5.14 s | 12:36:35.52+9.10 s | 3.96 |
| MEMHMembach | 78.9 | 80 | 12:36:40.09+13.67 s | – | – |
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