FLORENNES (BE)
Quarry blast7 May 2020
- Magnitude
- 0.9ML
- Depth
- –
- Belgian time
- 11:03:362020-05-07
- UTC
- 09:03:362020-05-07
Main parameters
| Date and time | 2020-05-07 09:03:36 UTC 2020-05-07 11:03:36 Belgian time |
|---|---|
| Magnitude | ML 0.9 |
| Epicentral coordinates | 50.258° N, 4.563° E Uncertainty ± 4.0 km |
| Event ID | ROB 9995 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-05-08 07:29:37 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
- 9
- Epicentral distance
- 15.4 – 111.2km
- Mean velocity, P wave
- 5.9km/s
- Mean velocity, S wave
- 3.4km/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: 9 measurements, root-mean-square deviation 0.18 s. S wave: 5 measurements, root-mean-square deviation 0.41 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 | |||||
| MRDMaredsous | 15.4 | 72 | 09:03:39.63+3.11 s | 09:03:40.73+4.21 s | 1.10 |
| DOUDourbes | 18.3 | 173 | 09:03:40.32+3.80 s | 09:03:42.26+5.74 s | 1.94 |
| TGATangissart | 38.7 | 356 | 09:03:43.30+6.78 s | – | – |
| BRQBracquegnies | 39.2 | 309 | 09:03:43.42+6.90 s | – | – |
| GESGesves | 39.9 | 69 | 09:03:43.46+6.94 s | 09:03:48.87+12.35 s | 5.41 |
| RCHRochefort | 48.8 | 103 | 09:03:44.91+8.39 s | 09:03:50.43+13.91 s | 5.52 |
| HOUHouvegnez | 103.3 | 84 | 09:03:54.27+17.75 s | 09:04:06.86+30.34 s | 12.59 |
| MEMHMembach | 110.0 | 69 | 09:03:55.59+19.07 s | – | – |
| MRGMont Rigi | 111.2 | 75 | 09:03:55.70+19.18 s | – | – |