FLORENNES (BE)
Quarry blast21 March 2019
- Magnitude
- 1.4ML
- Depth
- –
- Belgian time
- 09:43:242019-03-21
- UTC
- 08:43:242019-03-21
Main parameters
| Date and time | 2019-03-21 08:43:24 UTC 2019-03-21 09:43:24 Belgian time |
|---|---|
| Magnitude | ML 1.4 |
| Epicentral coordinates | 50.267° N, 4.610° E Uncertainty ± 2.2 km |
| Event ID | ROB 7975 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2019-03-21 09:53:17 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
- 11.9 – 52.1km
- Mean velocity, P wave
- 6.3km/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: 5 measurements, root-mean-square deviation 0.12 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 | |||||
| MRDMaredsous | 11.9 | 71 | 08:43:27.16+2.50 s | – | – |
| DOUDourbes | 19.1 | 183 | 08:43:28.25+3.59 s | 08:43:30.91+6.25 s | 2.66 |
| GESGesves | 36.4 | 69 | 08:43:31.27+6.61 s | – | – |
| RCHRochefort | 45.7 | 105 | 08:43:32.68+8.02 s | 08:43:38.55+13.89 s | 5.87 |
| CLAClavier | 52.1 | 71 | 08:43:33.43+8.77 s | – | – |
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